Online Etymology Dictionary

reaper (n.): Old English ripere, agent noun from reap (v.). As the name of a personification of death, from 1839.
rancour (n.): chiefly British English spelling of rancor; for ending see -or. Related: Rancourous.
life of Riley (n.): "life at ease," expression popularized by 1917, American English, sometimes said to trace to various songs from c. 1902.
discolour (v.): chiefly British English spelling of discolor (q.v.); for ending see -or. Related: Discoloured; discolouring; discolouration.
disfavour: chiefly British English spelling of disfavor (q.v.); for ending, see -or. Related: Disfavoured; disfavouring.
dishonour: chiefly British English spelling of dishonor; also see -or. Related: Dishonoured; dishonouring; dishonourable; dishonourably.
subsidise (v.): chiefly British English spelling of subsidize. For suffix, see -ize. Related: Subsidised; subsidising.
summarise (v.): chiefly British English spelling of summarize; for suffix, see -ize. Related: Summarised; summarising; summarisation.
stillness (n.): Old English stilnes "quiet, silence, peace, release, relaxation;" see still (adj.) + -ness.
sunbeam (n.): Old English sunnebeam; see sun (n.) + beam (n.). As "cheerful person" from 1886.
toothpick (n.): also tooth-pick, late 15c., from tooth + pick (n.). Old English had toðsticca.
synthesise (v.): chiefly British English spelling of synthesize. For suffix, see -ize. Related: Synthesised; synthesising.
surefire (adj.): also sure-fire, by 1864, American English, from sure + fire (v.). Originally of rifles.
thanage (n.): c. 1400, from Anglo-French thaynage (c. 1300), from English thane + Old French suffix -age (see -age).
tech (n.): 1906 as short for technical college (or institute, etc.), American English; 1942 as short for technician.
tenfold (adj.): Old English tienfeald; see ten + -fold. As an adverb in modern use from 1530s.
tenderize (v.): 1733, from tender + -ize. Specifically of food, recorded by 1935, originally American English. Related: Tenderized; tenderizing.
sorely (adv.): Old English sarlice "grievously, mournfully, bitterly, painfully;" see sore (adj.) + -ly (2).
eventuate (v.): 1788, American English, from Latin eventus, past participle of eventire (see event). Related: Eventuated; eventuating.
Somalia: country named for the indigenous Somali people, whose name (attested in English by 1814) is of unknown origin.
transcontinental (adj.): also trans-continental, 1853 (in transcontinental railroad), American English, from trans- + continental.
rollerskate (n.): also roller-skate, 1861, American English, from roller + skate (n.). The verb is from 1885. Related: Rollerskated; rollerskating.
recount (n.): also re-count, "a new count" (especially in an election), 1855, American English, from re- + count (n).
openly (adv.): Old English openlice "manifestly, plainly, clearly, unreservedly;" see open (adj.) + -ly (2).
bridge (v.): Old English brycgian "to bridge, make a causeway," from bridge (n.). Related: Bridged; bridging.
Mag: common pet form of the fem. proper name Margaret, attested since Middle English. Compare magpie.
mankiller (n.): also man-killer, early 15c., from man (n.) + killer. Old English words for this were manslaga, manslieht.
man-hater (n.): "misanthrope," 1570s, from man (n.) + hater. Old English had mannhata "man-hater."
marrowbone (n.): late 14c., from marrow + bone (n.). A poetic Old English word for "bone" was mearhcofa "marrow-chamber."
mouth (v.): c. 1300, "to speak," from mouth (n.). Related: Mouthed; mouthing. Old English had muðettan "to blab."
aggie (n.1): "college student studying agriculture," by 1880, American English college slang, from agriculture + -ie.
shield (v.): Old English gescildan, from the root of shield (n.). Related: Shielded; shielding. Compare German scilden.
lordship (n.): c. 1300, from Old English hlafordscipe "authority, rule" (translating Latin dominatio); see lord (n.) + -ship.
longing (n.): "yearning, desire," Old English langung "longing, weariness, sadness, dejection," from long (v.). Related: Longingly.
long-lived (adj.): early 15c., from long (adj.) + past participle of live (v.). Old English had langlife "long-lived."
bibliothecary (n.): "librarian," 1610s, from Latin bibliothecarius, from bibliotheca (see bibliothek). An earlier form in English was bibliothecar (1580s).
bibber (n.): "drinker, tippler," 1530s, from Middle English bib (v.) "to drink heartily" (see bib (n.)).
oil (v.): mid-15c., from oil (n.). Related: Oiled; oiling. An Old English verb in this sense was besmyrian.
undertaking (n.): "enterprise," early 15c., verbal noun from undertake (v.). An Old English word for this was underfangenes.
misty (adj.): Old English mistig; see mist (n.) + -y (2). Related: Mistily; mistiness.
outlaw (v.): Old English utlagian "to outlaw, banish," from utlaga "an outlaw" (see outlaw (n.)). Related: Outlawed; outlawing.
melt (n.): 1854, "molten metal," from melt (v.). In reference to a type of sandwich topped by melted cheese, 1980, American English.
yellow (v.): Old English geoluwian "to become yellow," from the source of yellow (adj.). Transitive sense from 1590s. Related: Yellowed; yellowing.
yoke (v.): Old English geocian "to yoke, join together," from yoke (n.). Related: Yoked; yoking.
toot sweet (adv.): "right away, promptly," 1917, American English, representing U.S. soldiers' mangled adaptation of French tout de suite.
meatless (adj.): Old English meteleas "without food, without eating," see meat + -less. Meaning "without meat" is from mid-14c.
name (v.): Old English namian "to name, call; nominate, appoint," from source of name (n.). Related: Named; naming.
moneyed (adj.): "having money," mid-15c., from past participle of Middle English verb monien "to supply with money" (see money (n.)).
moodiness (n.): Old English modignes "pride, passion, anger;" see moody + -ness. Meaning "condition of being moody" is from 1858.
moot (v.): "to debate," Old English motian "to meet, talk, discuss," from mot (see moot (n.)). Related: Mooted; mooting.