Online Etymology Dictionary

reredos (n.): late 14c., from Anglo-French rere-, archaic comb. form of rear, + dos "back" (see dossier).
reroute (v.): also re-route, 1929, from re- "back, again" + route (v.). Related: Rerouted; rerouting.
rerun (v.): 1804, in reference to races, from re- "back, again" + run (q.v.). The noun, in reference to filmed television, is recorded from 1934.
res ipsa loquitur: Latin, "the thing speaks for itself."
res judicata: a point decided by authority.
resale (n.): 1620s, from re- "back, again" + sale (q.v.).
reschedule (v.): 1966, from re- "back, again" + schedule (v.). Related: Rescheduled; rescheduling.
rescind (v.): 1630s, from Latin rescindere "to cut off, tear off, abolish," from re- "back" + scindere "to cut, split" (see shed (v.)). Related: Rescinded; rescinding.
rescission (n.): 1650s, from Late Latin rescissionem, noun of action from rescindere (see rescind).
rescue: c.1300 (n. and v.), from stem of Old French rescourre, from re-, intensive prefix, + escourre "to cast off, discharge," from Latin excutere "to shake off, drive away," from ex- "out" + -cutere, combining form of quatere "to shake" (see quash).
research: 1570s, "act of searching closely," from Middle French recerche (1530s), from Old French recercher "seek out, search closely," from re-, intensive prefix, + cercher "to seek for" (see search). Meaning "scientific inquiry" is first attested 1630s. Related: Researched; researching. Phrase research and development is recorded from 1923.
resect (v.): 1650s, from Latin resectus, past participle of resecare "to cut off," from re- + secare "to cut" (see section (n.)). Surgical sense is from 1846. Related: Resected; resecting.
resection (n.): 1610s, from Latin resectionem, noun of action from resecare (see resect).Surgical sense is from 1775.
resemblance (n.): late 14c., from Anglo-French resemblance (c.1300); see resemble + -ance.
resemble (v.): mid-14c., from Old French resembler (12c.), from re-, intensive prefix, + sembler "to appear, to seem, be like," from Latin simulare "to copy." Related: Resembled; resembling.
resend (v.): 1550s, from re- + send. Related: Resent; resending.
resent (v.): c.1600, from French ressentir "feel pain, regret," from Old French resentir (13c.), from re-, intensive prefix, + sentir "to feel," from Latin sentire (see sense (n.)). Related: Resented; resenting.
resentful (adj.): 1650s, from resent + -ful. Related: Resentfully; resentfulness.
resentment (n.): 1610s, from French ressentiment (16c.), from ressentir (see resent).
"Ridicule often parries resentment, but resentment never yet parried ridicule." [Walter Savage Landor, "Imaginary Conversations"]
reservation (n.): late 14c., "act of reserving," from Middle French reservation, from Late Latin reservationem (nominative reservatio), noun of action from past participle stem of Latin reservare (see reserve (n.)). U.S. Indian tribe sense is recorded from 1789, originally in reference to the Six Nations in New York State. Meaning "act or fact of engaging a room, a seat, etc." is from 1904, originally American English.
reserve (v.): mid-14c., from Old French reserver, from Latin reservare "keep back, save back," from re- "back" + servare "to keep, save, preserve, protect" (see observe). Reserved (in manner) first recorded 1601 in Shakespeare ("All's Well" v.3).
reserve (n.): "something stored up," 1650s, from reserve (v.).
reservoir (n.): 1680s, "a place where something tends to collect," from French réservoir "storehouse," from Old French reserver "to reserve" (see reserve (n.)). Specific meaning "artificial basin to collect and store a large body of water" is from 1705.
reset (v.): 1650s, from re- + set (v.). As a noun, from 1847.
resettlement (n.): 1630s, from resettle + -ment.
reshuffle (v.): 1830, of cards, 1899, of organizations, from re- "back, again" + shuffle (v.).
reside (v.): mid-15c., "to settle," from Old French resider, from Latin residere "to remain behind, rest," from re- "back, again" + sedere "to sit" (see sedentary). Meaning "to dwell permanently" first attested 1570s. Related: Resided; residing.
residence (n.): late 14c., from Medieval Latin residentia, from Latin residentem (nominative residens) "residing, dwelling," present participle of residere "reside" (see reside).
residency (n.): 1570s, see resident + -cy. Hospital sense is from 1924.
resident (n.): mid-15c., "an inhabitant, one who resides," from resident (adj.). Meaning "medical graduate in practice in a hospital as training" first attested 1892, American English.
resident (adj.): late 14c., "dwelling, residing," from Old French resident and directly from Latin residentus, past participle of residere (see reside).
residential (adj.): 1650s, "serving as a residence," from resident + -al (1). Meaning "having to do with housing" is from 1856.
residual (adj.): 1560s, from residue + -al (1).
residual (n.): 1550s; see residue + -al (2). Residuals "royalties" attested by 1966.
residue (n.): mid-14c., from Old French residu, from Latin residuum "a remainder," neuter of residuus "remaining, left over," from residere "remain behind" (see residence).
resign (v.): late 14c., from Old French resigner, from Latin resignare "to check off, cancel, give up," from re- "opposite" (see re-) + signare "to make an entry in an account book," literally "to mark" (see sign). The sense is of making an entry (signum) "opposite" -- on the credit side -- balancing the former mark and thus canceling the claim it represents. The meaning of "give up a position" is first recorded late 14c. Sense of "to give (oneself) up to some emotion or situation" is from 1718. Related: Resigned; resigning.
resignation (n.): late 14c., "act of resigning" (an office, etc.), from French résignation (14c.), from Medieval Latin resignationem, from past participle stem of Latin resignare (see resign). Meaning "submission, acquiescence" is from 1640s.
resignedly (adv.): 1670s, from resigned (past participle adjective from resign) + -ly (2).
resile (v.): 1520s, from obsolete French resiler or directly from Latin resilire "to jump back" (see resilience).
resilience (n.): 1620s, from Latin resiliens, present participle of resilire "to rebound, recoil," from re- "back" (see re-) + salire "to jump, leap" (see salient). Cf. result.
resilient (adj.): 1640s, from Latin resilientem, present participle of resilire (see resilience). Related: Resiliently.
resin (n.): late 14c., from Old French resine, from Latin resina "resin," from Greek rhetine "resin of the pine," of unknown origin.
resinate (v.): "impregnate with resin," 1891, from resin + -ate (2). Related: Resinated; resinating.
resinous (adj.): 1640s, from Latin resinosus; see resin + -ous.
resist (v.): late 14c., from Old French resister, from Latin resistere "to resist, to stand back, withstand," from re- "against" (see re-) + sistere "take a stand, stand firm" (see assist). Related: Resisted; resisting.
resistance (n.): early 15c., from French résistance, earlier resistence, from Late Latin resistentia, from Latin resistentem (nominative resistens), present participle of resistere (see resist). Meaning "organized covert opposition to an occupying or ruling power" is from 1939. Electromagnetic sense is from 1860.
resistant (adj.): c.1600, from French résistant, present participle of résister (see resist).
resistor (n.): 1905, in electricity, agent noun in Latin form from resist. Resister was used in this sense from 1759.
resolute (adj.): early 15c., "dissolved, of loose structure," from Latin resolutus, past participle of resolvere (see resolution). Meaning "determined, absolute" is from c.1500. Related: Resolutely.
resolution (n.): early 15c., "a breaking into parts," from Latin resolutionem (nominative resolutio) "process of reducing things into simpler forms," from past participle stem of resolvere "loosen" (see resolve). Originally sense of "solving" (as of mathematical problems) first recorded 1540s, that of "holding firmly" (in resolute) 1530s, and that of "decision or expression of a meeting" is from c.1600.