(adj) not conforming to standard usage, Syn. unaccepted, Example:the following use of `access' was judged unacceptable by a panel of linguists; `You can access your cash at any of 300 automatic tellers'
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
a. Not acceptable; not pleasing; not welcome; unpleasant; disagreeable; displeasing; offensive. -- Un`ac*cept"a*ble*ness, n. -- Un`ac*cept"a*bly, adv. [ 1913 Webster ]