English Explanatory Dictionary

mustn't

English dictionary entry

Meanings

verb
  1. Must not (negative auxiliary); used to indicate that something is forbidden or, in a tag question, that something is not necessary.

Pronunciation

/ˈmʌs.n̩t/ en-US mustn't.ogg

Word forms

mustn't

Etymology

From must + -n't.

Related words

shouldn't can't oughtn't
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