What is another word for a thou-shalt-not?
Pronunciation: [ɐ ðˈa͡ʊʃˌaltnˈɒt] (IPA) 
A thou-shalt-not is a phrase that typically refers to a commandment or rule that forbids a specific action or behavior. Some synonyms for this phrase include a prohibition, a taboo, a restriction, a ban, or a no-no. These words all imply that there is a set of rules or guidelines that should be followed and failing to do so will result in negative consequences. They are often used in conversations about morality or ethical behavior and imply that certain actions are deemed unacceptable or inappropriate. Regardless of the specific term used, the message is clear: some actions should be avoided at all costs.
