1 synonym for Impermissible

forbidden, prohibited, unacceptable, banned, unlawful, illicit, not allowed, out of bounds, off-limits, disallowed, unapproved, vetoed, interdicted, proscribed, taboo, restricted, unauthorized, unpermitted, inadmissible, non-permissible, not permitted, ruled out, verboten, beyond the pale, not sanctioned, not tolerated, off the table, out of the question, not acceptable, not admissible, not authorized, not licensed, not endorsed, not supported, not condoned, not countenanced, not approved of, not legitimized, not validated, not ratified, not recognized, not acknowledged, not certified, not accredited, not warranted, not justified, not defensible, not tenable, not permissible [x]