indolence (n.)youdaoicibaDictYouDict[indolence 词源字典]
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).[indolence etymology, indolence origin, 英语词源]
tritanopiayoudaoicibaDictYouDict
"A rare form of colour blindness resulting from insensitivity to blue light, causing confusion of greens and blues", Early 20th century: from trito- 'third' (referring to blue as the third colour in the spectrum) + an-1 'without' + -opia.