Online Etymology Dictionary

definitely (adv.): 1580s, from definite + -ly (2). As a colloquial emphatic word, attested by 1931.
epicureous (adj.): also epicurious, "epicurean," 1550s, an obsolete word from 16c.-17c., from Latin epicureus, from Greek epikoureios, from epikouros (see epicure).
elliptic (adj.): 1726, from Greek elleiptikos "pertaining to an ellipse," from elleipein (see ellipsis). Mostly in technical use; the common word is elliptical.
murderous (adj.): 1530s, a hybrid from murder + -ous. An Old English word for it was morðorhycgende. Related: Murderously; murderousness.
eco-: word-forming element referring to the environment and man's relation to it, abstracted from ecology, ecological; attested from 1969.
milli-: word-forming element meaning "thousandth part of a metric unit," from comb. form of Latin mille "thousand" (see million).
tattletale (n.): 1880, from tattle + tale. Probably patterned on telltale (1540s). A 16c. word for "tattle-tale" was pickthank.
maxi-: word-forming element meaning "maximum, very large, very long," from comb. form of maximum.
cautious (adj.): 1640s, from caution + -ous. The Latin word for this was cautus "careful, heedful." Related: Cautiously; cautiousness.
beek (v.): "to bask in the warmth" of something, early 13c., a northern and Scottish word of unknown origin; perhaps ultimately connected to bake (v.).
biblio-: word-forming element meaning "book" or sometimes "Bible," from Greek biblio-, from biblion "book" (see Bible).
osteo-: before vowels oste-, word-forming element meaning "bone, bones," from Greek osteon "bone" (see osseous).
nearby: "close at hand," late 14c. (one-word form from 15c.), from near + by.
logon: in computer sense, as one word, by 1975, from log (v.) + on.
loving (adj.): Old English lufenda (see love (v.)). Loving cup is attested from 1808. Lovingkindness was Coverdale's word.
madman (n.): early 14c., mad man, from mad (adj.) + man (n.). One-word form attested from c. 1400, prevalent from 16c.
helio-: word-forming element meaning "sun," from Greek helio-, comb. form of helios "sun" (see sol).
hebetude (n.): 1620s, from Latin hebetudo, noun of quality from hebes "blunt, dull," figuratively "sluggish; stupid," a word of unknown origin. Related: Hebetudinous.
carpo- (1): word-forming element meaning "fruit," from Latinized form of Greek karpo-, comb. form of karpos "fruit" (see carpel).
carpo- (2): word-forming element meaning "wrist," from comb. form of Latin carpus, from Greek karpos "wrist" (see carpus).
homophobic (adj.): by 1971, from homo- (2) "homosexual" + -phobia + -ic. Related: Homophobe; homophobia (which word is said to date from 1969).
Kevlar: registered trademark (DuPont) for a synthetic fiber developed there c. 1965; probably an invented word of no etymology.
governmental (adj.): 1744, from government + -al (1). Related: Governmentally. A Middle English word in the same sense was gubernatif (late 14c.).
Rwanda: African nation, named for indigenous people there, whose word for themselves is of unknown origin.
-escence: word-forming element meaning "process or state of being," from Latin -escentia, from -escentem (see -escent).
Shema: from Hebrew shema "hear!," imperative of shama "to hear." First word of Deut. vi:4.
-ency: word-forming element denoting quality or state, from Latin -entia. Derivatively identical with -ence; also see -ancy.
erg (n.2): "region of drifting sand dunes," 1875, from French erg (1854), from North African Arabic 'irj, from a Berber word.
elopement (n.): 1540s, from elope + -ment. (The word was in Anglo-French in 14c. as alopement).
spectro-: word-forming element meaning "of or by a spectroscope," also "of radiant energy," from comb. form of spectrum.
Euro-: before vowels Eur-, word forming element meaning "Europe, European," from comb. form of Europe.
evensong (n.): the native word for vespers, Old English æfensang; see even (n.) + song.
impune (adj.): "unpunished" (obsolete), 1610s, from Latin impunis "unpunished" (see impunity). For the word meaning "attack by argument," see impugn.
pogon-: word-forming element from comb. form of Greek pogon "the beard." Used in Pogonophile; pogonophobia.
cranio-: word-forming element meaning "of the brain," from Latinized comb. form of Greek kranion "skull" (see cranium).
pannikin (n.): "small metal cup," 1823, described as a Suffolk dialect word, from pan (n.) + diminutive suffix -kin.
parol (n.): "oral statement," late 15c., from Anglo-French (14c.), from Old French parole "word, speech, argument" (see parole (n.)).
parti-: "in two ways," word-forming element extracted late 16c. from parti-colored.
pharmacist (n.): 1811; see pharmacy + -ist. Replaced obsolete pharmacian (1720). The Latin word was pharmacopola, the Greek pharmakopoles.
pheno-: before vowels phen-, word-forming element in science meaning "pertaining to or derived from benzene," from phene.
physio-: word-forming element meaning "nature, natural, physical," from Greek physio-, comb. form of physios "nature" (see physic).
phyco-: word-forming element in science meaning "seaweed, algae," from Latinized comb. form of Greek phykos "seaweed, sea wrack."
-pathic: word-forming element from Latin pathicus, from Greek pathikos "suffering, remaining passive," from pathein "to suffer" (see pathos).
per-: word-forming element meaning "through, throughout; thoroughly; entirely, utterly," from Latin preposition per (see per (prep.)).
nosocomial (adj.): 1855, from Latin nosocomium, from Greek nosokomeion, from nosos "disease." Nosocome was a 17c. word for "hospital."
recto-: word-forming element meaning "pertaining to or involving the rectum," before vowels rect-, from comb. form of rectum.
quod: "prison," c. 1700, a cant slang word of unknown origin; perhaps a variant of quad in the "building quadrangle" sense.
-derm: word-forming element meaning "skin," from Greek derma "skin, hide, leather" (see derma).
di- (1): word-forming element meaning "two, double, twice," from Greek di-, from dis "twice," related to duo (see two).
di- (2): word-forming element meaning "apart, asunder," form of dis- before certain voiced consonants.