elucidate (v.)youdaoicibaDictYouDict[elucidate 词源字典]
1560s, perhaps via Middle French élucider (15c.) or directly from Late Latin elucidatus, past participle of elucidare "make light or clear," from assimilated form of ex- "out, away" (see ex-) + lucidus "clear" (see lucid). Related: Elucidated; elucidates; elucidating.[elucidate etymology, elucidate origin, 英语词源]
elucidation (n.)youdaoicibaDictYouDict
1560s, "act of making intelligible," noun of action from elucidate. As "an explanation" from 1660s.