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indolent [indolent 词源字典]: indolent: [18] Historically, indolent means ‘feeling no pain’ – indeed, that is how it was used as a technical medical term in English in the 17th and 18th centuries. It comes from late Latin indolens, which was based on the Latin verb dolere ‘suffer pain’ (source also of English dolour [13] and doleful [13]). English took the term directly from Latin, but meanwhile in French indolent had broadened out in meaning via ‘insensitive’ to ‘inactive, lethargic, lazy’, and that is the basis of the current English use of the adjective, acquired in the early 18th century.
=> doleful, dolour[indolent etymology, indolent origin, 英语词源]
indolence (n.): c. 1600, "insensitivity to pain," from French indolence (16c.), from Latin indolentia "freedom from pain, insensibility," noun of action from indolentem (nominative indolens) "insensitive to pain," used by Jerome to render Greek apelgekos in Ephesians; from Latin in- "not, opposite of, without" (see in- (1)) + dolentem (nominative dolens) "grieving," present participle of dolere "suffer pain, grieve." Sense of "laziness" (1710) is from notion of "avoiding trouble" (compare taking pains).
indolent (adj.): 1660s, "painless," from Late Latin indolentem (see indolence). Sense of "living easily" is 1710, from French indolent. Related: Indolently.