thou-shalt-not (noun) taboo: something not allowed, permitted
Sinonime: anathema,
ban,
disapproval, don't, forbiddance,
inhibition, interdict,
law,
limitation, no-no,
prohibition, proscription,
regulation, religious convention,
reservation,
restraint,
restriction,
sanction, social convention, stricture, superstition, thou-shalt-not
Antonime: allowance, mentionable