absurd, banned, barred, closed-out, contraband, contrary to reason, debarred, deported, ejected, excluded, exiled, expelled, forbade, forbid, forbidden, hopeless, illegal, illicit, impossible, inconceivable, left out, liquidated, logically impossible, nonpermissible, not in it, not included, not permitted, not possible, off limits, out of bounds, outlawed, oxymoronic, paradoxical, precluded, preposterous, purged, ridiculous, ruled-out, ruled out, self-contradictory, shut out, taboo, tabooed, unallowed, unauthorized, under the ban, unimaginable, unlawful, unlicensed, unpermissible, unsanctioned, unthinkable, untouchable, verboten, vetoed