# mustn't

Pronunciation: say "MUS-uhnt" /ˈmʌs.n̩t/

## Verb

1. Expresses that something is forbidden or not permitted; in a tag question, it conveys that something is not necessary. *(rare)*
   - Simple: Used to say that someone is not allowed to do something.
   - _Visitors mustn't feed the animals while walking through the sanctuary._
   - _She kept reminding herself that she mustn't spoil the surprise._

## Origin

Formed from "must" combined with the contraction "-n't" (short for "not").

Source: DictionaryAI, https://dictionaryai.com/define/mustn-t (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).