Synonyms of unacceptable

Adjective

1. unacceptable, unsatisfactory (vs. satisfactory)

usage: not adequate to give satisfaction; "the coach told his players that defeat was unacceptable"

2. unacceptable (vs. acceptable), exceptionable, objectionable, unsatisfactory, unwelcome

usage: not acceptable; not welcome; "a word unacceptable in polite society"; "an unacceptable violation of personal freedom"

3. impossible, insufferable, unacceptable, unsufferable, intolerable (vs. tolerable), unbearable, unendurable

usage: used of persons or their behavior; "impossible behavior"; "insufferable insolence"

4. unacceptable, unaccepted, nonstandard (vs. standard)

usage: 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'"