mustn't

must n't |ˈməsənt ˈməsnt | ▶contraction must not.

mustn't

mustn't |ˈmʌs (ə )nt | ▶contraction must not.

mustn't

must n't /mʌ́s (ə )nt / (! must-のtは発音しない ) (!｟ややくだけて ｠) must notの短縮形 .