verb

1. To disallow; to proscribe.

   “Smoking in the restaurant is forbidden.”

2. (ditransitive) To deny, exclude from, or warn off, by express command.

3. To oppose, hinder, or prevent, as if by an effectual command.

   “An impassable river forbids the approach of the army.”

Synonyms: ban, disallow, prohibit, veto

noun

1. The act by which something is forbidden; a prohibition.

adjective

1. Appearing to be threatening, unfriendly or potentially unpleasant.