unacceptable -- (not adequate to give satisfaction; "the coach told his players that defeat was unacceptable")
unacceptable -- (not acceptable; not welcome; "a word unacceptable in polite society"; "an unacceptable violation of personal freedom")
impossible, insufferable, unacceptable, unsufferable -- (used of persons or their behavior; "impossible behavior"; "insufferable insolence")
unacceptable, unaccepted -- (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'")