unacceptable

Adjective (4)

1. not adequate to give satisfaction“the coach told his players that defeat was unacceptable”Opposite satisfactorySimilar unsatisfactory
2. not acceptable; not welcome“a word unacceptable in polite society”“an unacceptable violation of personal freedom”Opposite acceptableSimilar exceptionable, objectionableSee also unsatisfactory, unwelcome
3. (used of persons or their behavior) not acceptable or reasonable“impossible behavior”Synonyms: impossibleOpposite tolerableSimilar intolerable, unbearable
4. not conforming to standard usage“the following use of ‘access’ was judged unacceptable by a panel of linguists: ‘You can access your cash at any of 300 automatic tellers’”Synonyms: unacceptedOpposite receivedSimilar nonstandard