retinitis (n.)youdaoicibaDictYouDict[retinitis 词源字典]
1821, from retina + -itis "inflammation."[retinitis etymology, retinitis origin, 英语词源]
retinue (n.)youdaoicibaDictYouDict
late 14c., from Old French retenue "group of followers, state of service," literally "that which is retained," noun use of fem. past participle of retenir "to employ, to retain, hold back" (see retain). Related: Retinular.
retiracy (n.)youdaoicibaDictYouDict
1824, American English, irregularly from retire on model of privacy.
retire (v.)youdaoicibaDictYouDict
1530s, of armies, "to retreat," from Middle French retirer "to withdraw (something)," from re- "back" (see re-) + Old French tirer "to draw" (see tirade). Related: Retired; retiring.

Meaning "to withdraw" to some place, especially for the sake of privacy, is recorded from 1530s; sense of "leave an occupation" first attested 1640s (implied in retirement). Meaning "to leave company and go to bed" is from 1660s. Transitive sense is from 1540s, originally "withdraw, lead back" (troops, etc.); meaning "to remove from active service" is from 1680s. Baseball sense of "to put out" is recorded from 1874.
retired (adj.)youdaoicibaDictYouDict
1580s, "separated from society or public notice," past participle adjective from retire (v.). Meaning "having given up business" is from 1824. Abbreviation ret'd. attested from 1942.
retiree (n.)youdaoicibaDictYouDict
1945, from retire + -ee.
retirement (n.)youdaoicibaDictYouDict
1590s, "act of retreating," also "act of withdrawing into seclusion," from Middle French retirement (1570s); see retire + -ment. Meaning "privacy" is from c. 1600; that of "withdrawal from occupation or business" is from 1640s.
retiring (adj.)youdaoicibaDictYouDict
1580s, "departing, retreating," present participle adjective from retire (v.). Also "fond of retiring, disposed to seclusion," hence "unobtrusive, modest, subdued" (1766).
retool (v.)youdaoicibaDictYouDict
1866, "to shape again with a tool," from re- "back, again" + tool (v.). Meaning "to furnish a factory with new equipment" is recorded from 1940. Related: Retooled; retooling.
retort (v.)youdaoicibaDictYouDict
1550s, "make return in kind" (especially of an injury), from Old French retort and directly from Latin retortus, past participle of retorquere "turn back, twist back, throw back," from re- "back" (see re-) + torquere "to twist" (see torque (n.)). Applied to exchanges of jest or sarcasm by c. 1600, hence "say or utter sharply and aggressively in reply" (1620s). Related: Retorted; retorting.
retort (n.1)youdaoicibaDictYouDict
"act of retorting," c. 1600, from retort (v.).
retort (n.2)youdaoicibaDictYouDict
"vessel used in chemistry for distilling or effecting decomposition by the aid of heat," c. 1600, from Middle French retorte, from Medieval Latin *retorta "a retort, a vessel with a bent neck," literally "a thing bent or twisted," from past participle stem of Latin retorquere (see retort (v.)).
retortion (n.)youdaoicibaDictYouDict
1590s, from Medieval Latin retortionem (nominative retortio), noun of action from past participle stem of Latin retorquere (see retort (v.)).
retouch (v.)youdaoicibaDictYouDict
1640s, from French retoucher (13c.) "to touch again" (with a view to improving), from re- "again" (see re-) + toucher (see touch (v.)).
retrace (v.)youdaoicibaDictYouDict
1690s, from French retracer "to trace again," from Middle French retracier, from re- "again" (see re-) + tracier "to trace" (see trace (v.)). Related: Retraced; retracing.
retract (v.)youdaoicibaDictYouDict
early 15c., "to draw (something) back," from Old French retracter (14c.) and directly from Latin retractus, past participle of retrahere "to draw back" (see retraction). Sense of "to revoke, recant, take back" is attested from 1540s, probably a back-formation from retraction. Related: Retracted; retracting.
retractable (adj.)youdaoicibaDictYouDict
"capable of being drawn in," 1769; see retract + -able. Meaning "capable of being disowned" is recorded from 1610s. Also sometimes spelled retractible.
retraction (n.)youdaoicibaDictYouDict
late 14c., "withdrawal of an opinion," from Latin retractionem (nominative retractio) "a drawing back, hesitation, refusal," noun of action from past participle stem of retractare "revoke, cancel," from re- "back" (see re-) + tractere "draw violently," frequentative of trahere "to draw" (see tract (n.1)). Originally the title of a book by St. Augustine correcting his former writings. Meaning "recantation of opinion with admission of error" is from 1540s.
retrain (v.)youdaoicibaDictYouDict
1905, from re- "back, again" + train (v.). Related: Retrained; retraining.
retransmission (n.)youdaoicibaDictYouDict
1788, from re- + transmission.