English
affectless
From affect + -less.
A compound of affect + -less
Proto-Indo-European *dʰeh₁- ‘to put, do’
…
Latin faciō ‘to do, make’
Latin afficiō ‘to cause to experience; to treat’
Latin affectō ‘to strive after, pursue’
Middle English affecten
English affect
Today it means
adj Lacking or not showing emotion.
Language periods are conventional ranges, not dates for this word.
Etymograph / affectless