unacceptable in WordNet English dictionary

1. used of persons or their behavior
   "impossible behavior"; "insufferable insolence"
   impossible  insufferable  unacceptable  unsufferable 
   
2. not acceptable; not welcome
   "a word unacceptable in polite society"; "an unacceptable violation of personal freedom"
   unacceptable 
   
3. 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'"
   unacceptable  unaccepted 
   
4. not adequate to give satisfaction
   "the coach told his players that defeat was unacceptable"
   unacceptable