Online Etymology Dictionary

mawkish (adj.): 1660s, "sickly, nauseated," from Middle English mawke "maggot" (see maggot). Sense of "sickly sentimental" is first recorded 1702. Related: Mawkishly; mawkishness.
medieval (adj.): 1827, "pertaining to or suggestive of the Middle Ages," coined in English from Latin medium "the middle" (see medium (n.)) + aevum "age" (see eon).
loganberry (n.): 1893, American English, named for U.S. horticulturalist James H. Logan (1841-1928), who developed it by crossing a blackberry and a raspberry.
bobolink (n.): American passerine bird, 1796, American English, earlier bob-lincoln, bob-o-Lincoln (1774), imitative of the hearty song of the bird.
another (adj.): early 13c., merger of an other. Old English used simply oþer. Originally "a second of two." Compound reciprocal pronoun one another is recorded from 1520s.
peradventure (adv.): 1620s, from Middle English peraventure (mid-15c.), from per auenture (late 13c.), from Old French par aventure (see adventure). Refashioned as though from Latin.
permafrost (n.): 1943, coined in English by Russian-born U.S. geologist Siemon W. Muller (1900-1970) from perm(anent) frost.
fructose (n.): sugar found in fruit, 1857, coined in English from Latin fructus "fruit" (see fruit) + chemical suffix -ose (2).
clench (v.): Old English (be)clencan "to hold fast, make cling," causative of clingan (see cling); compare stench/stink. Related: Clenched; clenching.
cicatrix (n.): 1640s, from Latin cicatrix (accusative cicatricem ) "a scar," which is of unknown origin. Earlier in English as cicatrice (mid-15c.). Related: cicatrical.
clad (adj.): "clothed," c. 1300, mid-13c., from clad, alternative past tense and past participle of clothe. Old English had geclæþd, past participle of clæþan.
lout (n.): 1540s, "awkward fellow, clown, bumpkin," perhaps from a dialectal survival of Middle English louten (v.) "bow down" (c. 1300), from Old English lutan "bow low," from Proto-Germanic *lut- "to bow, bend, stoop" (source also of Old Norse lutr "stooping," which might also be the source of the modern English word), from PIE *leud- "to lurk" (source also of Gothic luton "to deceive," Old English lot "deceit), also "to be small" (see little). Non-Germanic cognates probably include Lithuanian liudeti "to mourn;" Old Church Slavonic luditi "to deceive," ludu "foolish." Sense of "cad" is first attested 1857 in British schoolboy slang.
dormitory (n.): mid-15c., from Latin dormitorium "sleeping place," from dormire "to sleep" (see dormant). Old English had slæpern "dormitory," with ending as in barn.
Down's Syndrome: 1961, from J.L.H. Down (1828-1896), English physician; chosen as a less racist name for the condition than earlier mongolism.
gunk (n.): "viscous substance," 1949, American English, apparently from Gunk, trademark for a thick liquid soap patented 1932 by A.F. Curran Co. of Malden, Mass.
lullaby (n.): 1560s, lulley by, from Middle English lollai, lullay, from lullen (see lull (v.)). Second element perhaps from by-by "good-by."
lunk (n.): "slow-witted person," 1867, American English colloquial, shortened from lunkhead (1852), possibly an altered form of lump (n.) + head (n.)
Mercia: Anglo-Saxon kingdom of the Midlands, Latinized from Old English Mierce "men of the Marches," from mearc (see march (n.2)). Related: Mercian.
midnight (n.): Old English mid-niht, or middre niht (with dative). See mid + night. Midnight oil symbolizing "late night work" is attested from 1630s.
midst (n.): c. 1400, from Middle English middes (mid-14c.), from mid + adverbial genitive -s. The parasitic -t is perhaps on model of superlatives (compare against).
pharaoh (n.): title of the kings of ancient Egypt, Old English Pharon, from Latin Pharaonem, from Greek Pharao, from Hebrew Par'oh, from Egyptian Pero', literally "great house."
bonfire (n.): 1550s, from Middle English banefire (late 15c.), originally a fire in which bones were burned. See bone (n.) + fire (n.).
meteoroid (n.): "rock floating in space, which becomes a meteor when it enters Earth's atmosphere," formed in English, 1865, from meteor + -oid.
humdinger (n.): 1905, American English, originally used of beautiful women; probably from dinger, early 19c. slang word for anything superlative; also see hummer.
druthers (n.): 1895, from jocular formation based on I'd ruther, American English dialectal form of I'd rather (used by Bret Harte as drathers, 1875).
Boolean (adj.): in reference to abstract algebraic systems, 1851, named for George Boole (1815-1864), English mathematician. The surname is a variant of Bull.
bramble (n.): Old English bræmbel "rough, prickly shrub" (especially the blackberry bush), with euphonic -b-, from earlier bræmel, from Proto-Germanic *bræmaz (see broom).
minster (n.): Old English mynster "the church of a monastery" (8c.), from Late Latin monasterium (see monastery). Compare Old French moustier, French moûtier, Old Irish manister.
miscegenation (n.): "interbreeding of races," 1864, coined irregularly in American English from Latin miscere "to mix" (see mix (v.)) + genus "race" (see genus).
convict (v.): mid-14c., from Latin convictus, past participle of convincere "to 'overcome' in argument" (see convince). Replaced Old English verb oferstælan. Related: Convicted; convicting.
burg (n.): "town or city," 1843, American English colloquial, from many place names ending in -burg (see borough; also see -ville).
burp: 1932, noun and verb, American English, apparently imitative. The transitive sense of the verb is first recorded 1940. Related: Burped; burping. Burp gun attested from 1945.
buffet (n.1): "table," 1718, from French bufet "bench, stool, sideboard," 12c., which is of uncertain origin. Sense in English extended 1888 to "meal served from a buffet."
post-graduate (adj.): also postgraduate, 1858, originally American English, from post- + graduate (adj.). As a noun, attested from 1890. Abbreviation post-grad is recorded from 1950.
poultice (n.): 16c. alteration of Middle English pultes (late 14c.), ultimately from Latin pultes, plural of puls "porridge" (see pulse (n.2)).
plesiosaurus (n.): 1825, from Modern Latin Pleisiosaurus (1821), coined by English paleontologist William Daniel Conybeare (1787-1857) from Greek plesios "near," related to pelas, + -saurus.
plinth (n.): 1610s, from French plinthe (16c.) and directly from Latin plinthus, from Greek plinthos "brick, squared stone," cognate with Old English flint (see flint).
R.O.T.C.: also ROTC, 1916, American English, initialism (acronym) for Reserve Officers' Training Corps, established as part of the National Defense Act of 1916.
rowdy (n.): "a rough, quarrelsome person," 1808, American English, originally "lawless backwoodsman," probably from row (n.2). The adjective is first recorded 1819. Related: Rowdily; rowdiness.
braze (v.2): "to make of or cover in brass," Old English brasian "to do work in brass, make of brass," from bræs (see brass). Compare glaze from glass.
bridle (n.): Old English bridel "bridle, rein, curb, restraint," related to bregdan "move quickly," from Proto-Germanic *bregdilaz (see braid (v.)).
Bright's disease: "chronic nephritis," 1831, so called for English physician Richard Bright (1789-1858), who in 1827 first described it.
British (adj.): Old English Bryttisc "of or relating to (ancient) Britons," from Bryttas "natives of ancient Britain" (see Briton). First modern record of British Isles is from 1620s.
tussle (v.): "to struggle, scuffle, wrestle confusedly," late 15c. (transitive); 1630s (intransitive), Scottish and northern English variant of touselen (see tousle). Related: Tussled; tussling.
Audrey: fem. proper name, contracted from Etheldreda, a Latinized form of Old English Æðelðryð, literally "noble might," from æðele "noble" (see atheling) + ðryð "strength, might."
sprig (n.): "shoot, twig or spray of a plant, shrub," c. 1400, probably related to Old English spræc "shoot, twig," of obscure origin.
presidio (n.): 1808, American English, from Spanish presidio "fort, settlement," from Latin praesidium "defense, protection," from praesidere "to sit before, protect" (see preside).
cote (n.): Old English cote, fem. of cot (plural cotu) "small house, bedchamber, den" (see cottage). Applied to buildings for animals from early 15c.
county (n.): c. 1300, from Anglo-French counte, from Late Latin comitatus "jurisdiction of a count," from Latin comes (see count (n.)); replaced Old English scir "shire."
courtesy: early 13c., curteisie, from Old French curteisie (Modern French courtoisie), from curteis "courteous" (see courteous). A specialized sense of curteisie is the source of English curtsy.