英语词源字典 - 在线词源网站

corroborate [corroborate 词源字典]: corroborate: see robust
[corroborate etymology, corroborate origin, 英语词源]
elaborate: elaborate: [16] Etymologically, something that is elaborate has been produced by hard work. The word comes from ēlabōrātus, the past participle of Latin ēlabōrāre; this was a compound verb formed from the prefix ex- ‘out’ and labor ‘work’ (source of English labour). The notion of ‘painstaking work’ had passed by the early 17th century into ‘extreme detail’.
=> labour
collaborate (v.): 1871, back-formation from collaborator. Given a bad sense in World War II. Related: Collaborated; collaborating.
corroborate (v.): 1530s, "to give (legal) confirmation to," from Latin corroboratus, past participle of corroborare "to strengthen, invigorate," from com- "together" or "thoroughly" (see com-) + roborare "to make strong," from robur, robus "strength," (see robust).

Meaning "to strengthen by evidence, to confirm" is from 1706. Sometimes in early use the word also has its literal Latin sense, especially of medicines. Related: Corroborated; corroborating; corroborative.
elaborate (adj.): 1590s, "wrought by labor," from Latin elaboratus, past participle of elaborare "to exert oneself" (see elaboration). Meaning "very detailed" is from 1620s, via notion of "produced with great care and attention to detail." Related: elaborateness.
elaborate (v.): c. 1600, "to build up from simple elements," from Latin elaboratus, past participle of elaborare "to labor, endeavor, struggle, work out" (see elaboration). Meaning "to work out in detail" is attested from 1610s. Related: Elaborated; elaborating.
elaborately (adv.): 1630s, "with attention to exactness;" see elaborate (adj.) + -ly (2).