English
inacceptable
From in- + acceptable.
Formed from in- + acceptable
Proto-Indo-European *kap-
…
Latin acceptō
Late Latin acceptābilis ‘worthy of acceptance’
Middle French acceptable
Middle English acceptable ‘Pleasant, agreeable’
English acceptable
Today it means
adj Unacceptable.
Language periods are conventional ranges, not dates for this word.
Etymograph / inacceptable