Online Etymology Dictionary

friendship (n.): Old English freondscipe "friendship, mutual liking and regard," also "conjugal love;" see friend (n.) + -ship. Similar formation in Dutch vriendschap, German Freundschaft, Swedish frändskap.
self-: word forming element indicating "oneself," also "automatic," from Old English use of self (pron.) in compounds, such as selfbana "suicide," selflice "self-love, pride, vanity, egotism," selfwill "free will."
Rouen: city in northern France, Roman Rotomagus, in which the second element is Gaulish magos "field, market," and the first is roto "wheel," perhaps reflecting the Gaulish love of chariot-racing, or else it is a personal name.
Werther: love-lorn hero of Goethe's "Die Leiden des jungen Werthers" ("The Sorrows of Young Werther"), popular and influential short novel published in 1774. His name was used as a type of morbid sentimentality.
pamphlet (n.): "small, unbound treatise," late 14c., from Anglo-Latin panfletus, popular short form of "Pamphilus, seu de Amore" ("Pamphilus, or about Love"), a short 12c. Latin love poem popular and widely copied in Middle Ages; the name from Greek pamphilos "loved by all," from pan- "all" + philos "loving, dear" see -phile). Meaning "brief work dealing with questions of current interest" is late 16c.
romantic (adj.): 1650s, "of the nature of a literary romance," from French romantique, from Middle French romant "a romance," oblique case of Old French romanz "verse narrative" (see romance (n.)).

As a literary style, opposed to classical since before 1812; in music, from 1885. Meaning "characteristic of an ideal love affair" (such as usually formed the subject of literary romances) is from 1660s. Meaning "having a love affair as a theme" is from 1960. Related: Romantical (1670s); romantically. Compare romanticism.
minnesinger (n.): one of a class of medieval German poets who imitated the troubadours, 1825, from German minnesinger, from minne "love," especially "sexual love" (from Old High German minna "loving memory," originally "memory;" see mind (n.)) + singer (see singer). German minne by c. 1500 no longer was considered decent, and it became a taboo word until revived 18c. in poetic language.
madrigal (n.): "short love poem," also "part-song for three or more voices," 1580s, from Italian madrigale, probably from Venetian dialect madregal "simple, ingenuous," from Late Latin matricalis "invented, original," literally "of or from the womb," from matrix (genitive matricis) "womb" (see matrix).
votary (n.): 1540s, "one consecrated by a vow," from Latin votum "a promise to a god; that which is promised" (see vow (n.)) + -ary. Originally "a monk or nun," general sense of "ardent devotee of some aim or pursuit" is from 1591 (in Shakespeare, originally in reference to love). Related: Votaress.
hemophilia (n.): 1848 (also sometimes in Englished form hæmophily), from German hämophile, coined 1828 by German physician Johann Lucas Schönlein (1793-1864), from Greek haima "blood, bloodshed, streams of blood" (see -emia) + philia "to love" (see -philia), here with a sense of "tendency to."
amateur (n.): 1784, "one who has a taste for (something)," from French amateur "lover of," from Latin amatorem (nominative amator) "lover," agent noun from amatus, past participle of amare "to love" (see Amy). Meaning "dabbler" (as opposed to professional) is from 1786. As an adjective, by 1838.
amiable (adj.): mid-14c., from Old French amiable, from Late Latin amicabilis "friendly," from amicus "friend," related to amare "to love" (see Amy). The form confused in Old French with amable "lovable," from Latin amare. Reborrowed later in proper Latin form as amicable.
Amy: fem. proper name, from Old French Amee, literally "beloved," from fem. past participle of amer "to love," from Latin amare, perhaps from PIE *am-a-, suffixed form of root *am-, a Latin and Celtic root forming various nursery words for "mother, aunt," etc. (such as Latin amita "aunt").
dislike (v.): 1540s (implied in disliking), hybrid which ousted native mislike as the opposite of like (v.). Related: Disliked; disliking. English in 16c. also had the excellent dislove "hate, cease to love," but it did not survive.
furnace (n.): early 13c., from Old French fornais "oven, furnace," figuratively "flame of love" (12c.), from Latin fornacem (nominative fornax) "an oven, kiln," related to fornus/furnus "oven," and to formus "warm," from PIE root *gwher- "warm" (source also of Greek thermos, Old English wearm; see warm (adj.)).
philander (v.): 1737, from the noun meaning "a lover" (1700), from Philander, popular name for a lover in stories, drama, and poetry, from Greek adjective philandros "with love for people," perhaps mistaken as meaning "a loving man," from phil- "loving" (see philo-) + andr-, stem of aner "man" (see anthropo-). Related: Philandered; philandering.
-phile: also -phil, word-forming element meaning "one that loves, likes, or is attracted to," via French -phile and Medieval Latin -philus in this sense, from Greek -philos, common suffix in personal names (such as Theophilos), from philos "loving, dear," from philein "to love," which is of unknown origin.
philo-: before vowels phil-, word-forming element meaning "loving, fond of, tending to," from Greek philo-, comb. form of philos "dear" (adj.), "friend" (n.), from philein "to love," of unknown origin. Productive of a great many compounds in ancient Greek.
Aphrodite (n.): Greek goddess of love and beauty; by the ancients, her name was derived from Greek aphros "foam," from the story of her birth, but perhaps it is ultimately from Phoenician Ashtaroth (Assyrian Ishtar). In 17c. English, pronounced to rhyme with night, right, etc.
mons (n.): from Latin mons (plural montes) "mountain" (see mount (n.1)); used in English in various anatomical senses, especially mons Veneris "mountains of Love," fleshy eminence atop the vaginal opening, 1690s; often mons for short.
sadism (n.): "love of cruelty," 1888, from French sadisme, from the name of Count Donatien A.F. de Sade (1740-1815). Not a marquis, though usually now called one, he was notorious for cruel sexual practices he described in his novels.
sinus (n.): "hollow curve or cavity in the body," early 15c., from Medieval Latin sinus, from Latin sinus "bend, fold, curve, a bent surface; a bay, bight, gulf; a fold in land;" also "fold of the toga about the breast," hence "bosom," and figuratively "love, affection, intimacy; interior, inmost part;" of unknown origin.
scuttle (v.1): "scamper, scurry," mid-15c., probably related to scud (v.). Related: Scuttled; scuttling.
I should have been a pair of ragged claws
Scuttling across the floors of silent seas.
[T.S. Eliot, "The Love Song of J. Alfred Prufrock"]
diligence (n.): mid-14c., from Old French diligence "attention, care; haste, speed," from Latin diligentia "attentiveness, carefulness," from diligentem (nominative diligens) "attentive, assiduous, careful," originally present participle of diligere "single out, value highly, esteem, prize, love; aspire to, be content with, appreciate," originally "to pick out, select," from dis- "apart" (see dis-) + legere "choose, gather" (see lecture (n.)).

Sense evolved from "love" through "attentiveness" to "carefulness" to "steady effort." From the secondary French sense comes the old useage of diligence for "public stage coach" (1742; dilly for short), from a French shortening of carrosse de diligence.
Bloomsbury: 1910, in reference to the set of Bohemian writers, artists, and intellectuals (including E.M. Forster, Virginia Woolf, Vanessa and Clive Bell, John Maynard Keynes) centered on Lytton Strachey; so called from the London neighborhood where several lived and worked.
Women in love with buggers and buggers in love with womanizers, I don't know what the world is coming to. [Lytton Strachey]
The place name is recorded 1291 as Blemondesberi "manor held by the Blemond family," from Blémont in France. It was laid out for housing in 17c., fashionable from 18c.
solitude (n.): mid-14c., from Old French solitude "loneliness" (14c.) and directly from Latin solitudinem (nominative solitudo) "loneliness, a being alone; lonely place, desert, wilderness," from solus "alone" (see sole (adj.)). "Not in common use in English until the 17th c." [OED]
A man can be himself only so long as he is alone; ... if he does not love solitude, he will not love freedom; for it is only when he is alone that he is really free. [Schopenhauer, "The World as Will and Idea," 1818]
Solitudinarian "recluse, unsocial person" is recorded from 1690s.
jollity (n.): early 14c., jolyfte, iolite, "merrymaking, revelry," also "agreeableness, attractiveness, beauty, elegance;" from Old French jolivete "gaity, cheerfulness; amorous passion; life of pleasure," from jolif "festive, merry" (see jolly).

From late 14c. as "lightheartedness, cheerfulness." A word with more senses in Middle and early Modern English than recently: "sexual pleasure or indulgence, lust" (mid-14c.); "insolent presumptuousness, impudence" (mid-14c.); "vigor, strength" (mid-14c.); "love; a love affair" (c. 1300, hence in jollity "by fornication, out of wedlock"); "gallantry" (1530s); "state of splendor" (1540s).
nationality (n.): 1690s, "national quality," from national + -ity (in some usages perhaps from French nationalité. As "fact of belonging to or being a citizen of a particular state," from 1828, gradually shading into "race, ethnicity." Meaning "separate existence as a nation" is recorded from 1832. Related: Nationalities.
But I do love a country that loves itself. I love a country that insists on its own nationality which is the same thing as a person's insisting on his own personality. [Robert Frost, letter, April 21, 1919]
Venus: late Old English, from Latin Venus (plural veneres), in ancient Roman mythology, the goddess of beauty and love, especially sensual love, from venus "love, sexual desire; loveliness, beauty, charm; a beloved object," from PIE root *wen- (1) "to strive after, wish, desire."

This root is the source of Sanskrit veti "follows after," vanas- "desire," vanati "desires, loves, wins;" Avestan vanaiti "he wishes, is victorious;" Latin venerari "to worship;" Old English wynn "joy," wunian "to dwell," wenian "to accustom, train, wean," wyscan "to wish."

Applied by the Romans to Greek Aphrodite, Egyptian Hathor, etc. Applied in English to any beautiful, attractive woman by 1570s. As the name of the most brilliant planet from late 13c., from this sense in Latin (Old English called it morgensteorra and æfensteorra). The venus fly-trap (Dionæa muscipula) was discovered 1760 by Gov. Arthur Dobbs in North Carolina and description sent to Collinson in England. The Central Atlantic Coast Algonquian name for the plant, /titipiwitshik/, yielded regional American English tippity wichity.
believe (v.): Old English belyfan "to believe," earlier geleafa (Mercian), gelefa (Northumbrian), gelyfan (West Saxon) "believe," from Proto-Germanic *ga-laubjan "to believe," perhaps literally "hold dear, love" (source also of Old Saxon gilobian "believe," Dutch geloven, Old High German gilouben, German glauben), ultimately a compound based on PIE *leubh- "to care, desire, love" (see belief).

Spelling beleeve is common till 17c.; then altered, perhaps by influence of relieve, etc. To believe on instead of in was more common in 16c. but now is a peculiarity of theology; believe of also sometimes was used in 17c. Related: Believed (formerly occasionally beleft); believing. Expression believe it or not attested by 1874; Robert Ripley's newspaper cartoon of the same name is from 1918. Emphatic you better believe attested from 1854.
romance (n.): c. 1300, "a story, written or recited, of the adventures of a knight, hero, etc.," often one designed principally for entertainment," from Old French romanz "verse narrative" (Modern French roman), originally an adverb, "in the vernacular language," from Vulgar Latin *romanice scribere "to write in a Romance language" (one developed from Latin instead of Frankish), from Latin Romanicus "of or in the Roman style," from Romanus "Roman" (see Roman).

The sense evolution is because medieval vernacular tales usually told chivalric adventures full of marvelous incidents and heroic deeds. In reference to literary works, often in Middle English meaning ones written in French but also applied to native compositions. Literary sense extended by 1660s to "a love story." Meaning "adventurous quality" first recorded 1801; that of "love affair" is from 1916. Romance novel attested from 1964. Compare Romance (adj.).
uranian (adj.): "homosexual," 1893, from the reference to Aphrodite in Plato's "Symposium;" Urania "Heavenly" (Greek Ourania; see Uranus) being an epithet of Aphrodite as born of Uranus and also as distinguished from the vulgar Venus of commonplace lust.
But the son of the heavenly Aphrodite is sprung from a mother in whose birth the female has no part, but she is from the male only; this is that love which is of youths only, and the goddess being older has nothing of wantonness. Those who are inspired by this love turn to the male, and delight in him who is the more valiant and intelligent nature; any one may recognize the pure enthusiasts in the very character of their attachments. [B. Jowett, transl., 1874]
Also as a noun, "a homosexual person" (1908). Related uranism "homosexuality" (1893).
dearth (n.): mid-13c., derthe "scarcity" (originally used of famines, when food was costly because scarce; extended to other situations of scarcity from early 14c.), abstract noun formed from root of Old English deore "precious, costly" (see dear) + abstract noun suffix -th (2). Common Germanic formation, though not always with the same sense (cognates: Old Saxon diurtha "splendor, glory, love," Middle Dutch dierte, Dutch duurte, Old High German tiurida "glory").
half-wit (n.): "simpleton" (one lacking all his wits), 1755, from half + wit (n.). Earlier "a would-be wit whose abilities are mediocre" (1670s).
Half-wits are fleas; so little and so light,
We scarce could know they live, but that they bite.
[Dryden, "All for Love"]
Phrase out of half wit "half out of one's mind" was in Middle English (late 14c.). Half-witted "lacking common sense" is from 1640s.
kakistocracy (n.): "government by the worst element of a society," 1829, coined (by Thomas Love Peacock) on analogy of its opposite, aristocracy, from Greek kakistos "worst," superlative of kakos "bad" (which perhaps is related to the general Indo-European word for "defecate;" see caco-) + -cracy. Perhaps the closest word in ancient Greek was kakonomia "a bad system of laws and government," hence kakonomos "with bad laws, ill-governed."
echo (n.): mid-14c., "sound repeated by reflection," from Latin echo, from Greek echo, personified in classical mythology as a mountain nymph who pined away for love of Narcissus until nothing was left of her but her voice, from or related to ekhe "sound," ekhein "to resound," from PIE *wagh-io-, extended form of root *(s)wagh- "to resound" (source also of Sanskrit vagnuh "sound," Latin vagire "to cry," Old English swogan "to resound"). Related: Echoes. Echo chamber attested from 1937.
immortal (adj.): late 14c., "deathless," from Latin immortalis "deathless, undying" (of gods), "imperishable, endless" (of fame, love, work, etc.), from assimilated form of in- "not, opposite of" (see in- (1)) + mortalis "mortal" (see mortal (adj.)). In reference to fame, literature, etc., "unceasing, destined to endure forever, never to be forgotten, lasting a long time," attested from early 15c. (also in classical Latin). As a noun, "an immortal being," from 1680s.
mahatma (n.): 1884, literally "great-souled," from Sanskrit mahatman, from maha "great," from PIE root *meg- "great" (see magnate) + atman, "soul, principle of life," properly "breath" (see atman). In esoteric Buddhism, "a person of supernatural powers." In common use, as a title, a mark of love and respect. Said to have been applied to Gandhi (1869-1948) in 1915 by poet Rabrindranath Tagore.
lap (v.2): early 14c., "to surround (something with something else)," from lap (n.1). Figurative use, "to envelop (in love, sin, desire, etc.)" is from mid-14c. Meaning "lay one part over another, lay in such a way as to cover part of something underneath" is from c. 1600. The sense of "to get a lap ahead (of a competitor) on a track" is from 1847, on notion of "overlapping" (see lap (n.2)). Related: Lapped; lapping.
main (adj.): early 13c., "large, bulky, strong," from Old English mægen- "power, strength, force," used in compounds (such as mægensibb "great love," mægenbyrðen "heavy burden;" see main (n.)), probably also from or influenced by Old Norse megenn (adj.) "strong, powerful." Sense of "chief" is c. 1400. Main course in the meal sense attested from 1829. Main man "favorite male friend; hero" is from 1967, African-American vernacular.
majorette (n.): "baton-twirler," 1941, short for drum-majorette (1938), fem. of drum-major (1590s).
The perfect majorette is a pert, shapely, smiling extrovert, who loves big, noisy crowds and knows how to make those crowds love her. ["Life" magazine, Oct. 10, 1938]
(The article notes that the activity "has been going on for about six years now").
venery (n.1): "pursuit of sexual pleasure," mid-15c., from Medieval Latin veneria "sexual intercourse," from Latin venus (genitive veneris) "sexual love, sexual desire" (see Venus). In earlier use it may have been felt as a play on now obsolete homonym venery (n.2) "practice or sport of hunting, the chase." Related: Venereous.
affection (n.): early 13c., "an emotion of the mind, passion, lust as opposed to reason," from Old French afection (12c.) "emotion, inclination, disposition; love, attraction, enthusiasm," from Latin affectionem (nominative affectio) "a relation, disposition; a temporary state; a frame, constitution," noun of state from past participle stem of afficere "to do something to, act on" (see affect (n.)). Sense developed from "disposition" to "good disposition toward" (late 14c.). Related: Affections.
orc (n.): "ogre, devouring monster," Old English orcþyrs, orcneas (plural), perhaps from a Romanic source akin to ogre, and ultimately from Latin Orcus "Hell," a word of unknown origin. Revived by J.R.R. Tolkien (1892-1973) as the name of a brutal race in Middle Earth.
But Orcs and Trolls spoke as they would, without love of words or things; and their language was actually more degraded and filthy than I have shown it. ["Return of the King," 1955]
Agnes: fem. proper name, mid-12c., from Old French Agnes, from Greek Hagne "pure, chaste," from fem. of hagnos "holy," from PIE *yag- "to worship, reverence" (see hagiology). St. Agnes, martyred 303 C.E., is patron saint of young girls, hence the folk connection of St. Agnes' Eve (Jan. 20-21) with love divinations. In Middle English, frequently phonetically as Annis, Annys. In U.S., among the top 50 names for girls born between 1887 and 1919.
dildo (n.): 1590s, perhaps a corruption of Italian deletto "delight," from Latin dilectio, noun of action from diligere "to esteem highly, to love" (see diligence). Or (less likely) of English diddle. "Curse Eunuke dilldo, senceless counterfet" ["Choise of Valentines or the Merie Ballad of Nash his Dildo," T. Nashe, c. 1593] A classical Latin word for one was fascinum (see fascinate). In later English sometimes a French word, godemiche, was used (1879).
flamboyant (adj.): 1832, originally in reference to a 15c.-16c. architectural style with wavy, flame-like curves, from French flamboyant "flaming, wavy," present participle of flamboyer "to flame," from Old French flamboiier "to flame, flare, blaze, glow, shine" (12c.), from flambe "a flame, flame of love," from flamble, variant of flamme, from Latin flammula "little flame" (see flame (n.)). Extended sense of "showy, ornate" is from 1879. Related: Flamboyantly.
hickie (n.): "love bite; mark on skin made by biting or sucking during foreplay or sex," 1934; earlier "pimple, skin lesion" (c. 1915); perhaps a sense extension and spelling variation from the earlier word meaning "small gadget, device; any unspecified object" (1909, see hickey and compare doohickey, still used in this sense).
nuptial (adj.): late 15c., from Middle French nuptial, or directly from Latin nuptialis "pertaining to marriage," from nuptiae "wedding," from nupta, fem. past participle of nubere "to marry, wed, take as a husband," related to Greek nymphe "bride," from PIE *sneubh- "to marry, wed" (source also of Old Church Slavonic snubiti "to love, woo," Czech snoubiti "to seek in marriage," Slovak zasnubit "to betroth"). Related: Nuptially.
fondle (v.): 1690s, "treat with indulgence and affection" (now obsolete), from fond (adj.) + frequentative ending. Or possibly from the obsolete verb fond "be fond, be in love, dote" (1520s), from the adjective or altered from earlier fon. Sense of "caress" first recorded 1796. As a noun from 1833. Related: Fondled; fondling (1670s as a past participle adjective); fondlesome.