Online Etymology Dictionary

Adonai: Old Testament word for "God," late 14c., from Medieval Latin, from Hebrew, literally "my lord," from adon (see Adonis) + suffix of 1st person.
-acious: adjectival word-forming element meaning "given to, inclined to, abounding in," from Latin -aci- (nominative -ax), noun ending used with verbal stems, + -ous.
Graeco-: also Greco-, modern word-forming element, from Latin Graecus "Greek" (see Greek (n.)) on model of Anglo-, Franco-, etc.
historico-: word-forming element meaning "historical," from Latinized form of Greek historikos "historical" (see historical). Modern combinations sometimes use historio-.
priestly (adj.): mid-15c.; see priest + -ly (1). Old English had preostlic, but the modern word seems to be a Middle English re-formation.
hypno-: word-forming element meaning "sleep," from Greek hypnos "sleep," from PIE *supno-, suffixed form of root *swep- (1) "to sleep" (see somnolence).
atto-: word-forming element meaning "one quintillionth," 1962, from Danish atten "eighteen" (a quintillion is 10 to the 18th power), related to Old English eahtatene (see eighteen).
hiding (n.1): "concealment," early 13c., verbal noun from hide (v.1). Hiding-place is from mid-15c.; an Old English word for this was hydels.
-arch: word-forming element meaning "a ruler," from Greek arkhos "leader, chief, ruler," from arkhe "beginning, origin, first place" (see archon).
heal-all (n.): 1570s, "universal remedy," from heal + all; applied since 1814 to various plants supposed to possess healing virtues. The native word for panacea.
Apollonian (adj.): 1660s, from Apollo (Greek Apollon) + -ian. The Greek adjective was Apollonios. The word also is attested in English as Apollinarian (1753), Apolline (c. 1600).
forever (adv.): late 14c., for ever; from for + ever. Often written as one word from late 17c. As a noun by 1858. Emphatic forevermore is from 1819.
referral (n.): 1920, "act of referring," from refer + -al (2). Especially to an expert or specialist (a sense attested from 1955). Earlier word was referment (1550s).
monotone (n.): "unvarying tone in music or speaking," 1640s; see monotony. OED says use of the word as a noun "is peculiar to Eng." Related: Monotonic; monotonically.
falafel (n.): by 1951 as a traveler's word, not common or domestic in English until 1970s; from Arabic falafil, said to mean "crunchy."
gast (adj.): "animal which does not produce in season," 1729, an East Anglian dialect word, perhaps from or related to Middle Dutch gast "barren soil."
firstly (adv.): "in the first place, before anything else," 1530s, but never a common word (simple first usually serving its place), from first + -ly (2).
infra (adv.): "under, below, further on," from Latin infra "below, under, beneath" (see infra-). A Latin word sometimes encountered in footnotes.
kino-: before vowels, kin-, word-forming element in use from late 19c. and meaning "motion," from Greek kino-, from kinein "to move" (see cite).
labio-: word-forming element in medical use since 17c., taken as a comb. form of Latin labium "lip" (see lip (n.)).
-in (2): word-forming element in chemistry, usually indicating a neutral substance, antibiotic, vitamin, or hormone; a modification and specialized use of -ine (2).
cardboard (n.): 1848, from card (n.) + board (n.1). Figurative sense is from 1893. An earlier word for the same stuff was card paper (1777).
daimon (n.): transliteration of Greek daimon "lesser god, guiding spirit, tutelary deity," 1852; see demon. Employed to avoid the post-classical associations of that word.
dar: Arabic word, literally "house," used in place names, such as Dar es Salaam, Tanzania, literally "House of Peace."
criminy (interj.): also crimine, 1680s; it looks like Italian crimine "crime" but likely is simply another euphemism for Christ as a swear-word.
deferment (n.): 1610s, from defer (v.1) + -ment. As a word for "conditional exemption from a military draft" it dates to 1918, American English.
entero-: before vowels enter-, word-forming element meaning "intestine," from comb. form of Greek enteron "an intestine, piece of gut" (see enteric).
botryo-: before vowels botry-, word-forming element meaning "cluster, cluster-like," from Greek botrys "cluster of grapes," which is of unknown origin.
-eme: in linguistics, noted as an active suffix and word-formation element from 1953; from French -ème "unit, sound," from phonème (see phoneme).
drowse (v.): 1570s, probably a back-formation from drowsy. Old English had a similar word, but there is a 600-year gap. Related: Drowsed; drowsing.
chipotle (n.): "smoke-dried jalapeño chili," from Mexican Spanish, ultimately a Nahuatl (Aztecan) word, said to be a compound of chilli "chili pepper" (see chili) + poctli "smoke."
connote (v.): 1660s, from Medieval Latin connotare "to mark along with," (see connotation). A common word in medieval logic. Related: Connoted; connoting.
-centric: word-forming element meaning "having a center (of a certain kind); centered on," from Latinized form of Greek kentrikos "pertaining to a center," from kentron (see center (n.)).
chai (n.): "tea," 1919, from the Russian or Arabic word for "tea" (see tea, and compare cha). Now used especially of spiced teas.
battlefield (n.): 1812, from battle (n.) + field (n.). The usual word for it in Old English was wælstow, literally "slaughter-place."
beginning (n.): late 12c., "time when something begins," from begin. Meaning "act of starting something" is from early 13c. The Old English word was fruma (see foremost).
loquacity (n.): c. 1200, from Latin loquacitatem (nominative loquacitas) "talkativeness," from loquax "talkative" (see loquacious). An Old English word for it was ofersprecolnes.
mage (n.): "magician," c. 1400, Englished form of Latin magus "magician" (see magi). An "archaic" word by late 19c. (OED), revived by fantasy games.
-ol: word-forming element in chemistry, variously representing alcohol, phenol, or in some cases Latin oleum "oil" (see oil (n.)).
oo-: word-forming element meaning "egg, eggs," from Greek oon "egg," cognate with Latin ovum, Old Norse egg (see egg (n.)).
overlord (n.): c. 1200, from over- + lord (n.). Chosen 1943 as the Allied code-word for the D-Day invasion of northern France.
geographer (n.): "one versed in geography," 1540s, from geography + agent noun ending -er (1). The Greek word was geographos (Medieval Latin geographus).
carbide (n.): compound formed by combination of carbon and another element, 1848, from carb-, comb. form of carbon + chemical suffix -ide. The earlier word was carburet.
giga-: word-forming element meaning "billion" (U.S.) in the metric system, 1947, formed arbitrarily from Greek gigas "giant" (see giant).
harmful (adj.): mid-14c., from harm (n.) + -ful. Related: Harmfully. Old English had hearmful but the modern word probably is a Middle English formation.
heritable (adj.): early 15c., from Old French heritable (c. 1200), from heriter "to inherit" (see heritage). The Medieval Latin word was hereditabilis. Related: Heritability.
homophile (n.): 1960, from homo- (2) "homosexual" + -phile. An attempt to coin a word for a homosexual person as part of a social group, rather than a sexual deviant.
hottie (n.): also hotty, "attractive person," teen slang by 1995, from hot + -ie. The same word was used from 1947 with sense "hot water bottle."
innermost (adj.): mid-14c., from inner + -most. In the same sense innerest is from c. 1200. The older word is inmost. Innermore also existed in Middle English.
idio-: word-forming element meaning "one's own, personal, distinct," from Greek idios "own, personal, private, one's own" (see idiom).