precluded, prevented, stopped
excluded, ruled out, shut out, unsanctioned, vetoed
blocked, hindered, impeded, obstructed, 
disallowed, disapproved, discouraged
refused, rejected, revoked, repressed, suppressed
TYPICALLY as a result of the ...
intolerable, unacceptable, unbearable, unendurable
illegal, illegitimate, illicit, improper, inappropriate, 
unauthorized, unlawful, unlicensed
ineffable, unmentionable, unseemly, unsuitable, objectionable