mustn't

动词 v.
中文释义

英文释义

动词 v.
  1. Must not (negative auxiliary); used to indicate that something is forbidden or, in a tag question, that something is not necessary. uncommon
    — You mustn't blame yourself for this tragedy.

词源

Etymology tree
English must
English -n't
English mustn't
From must + -n't.
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