a closed mouth gathers no feet

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• Received-Pronunciation: /ə ˈkləʊzd ˌmaʊθ ˈɡæ.ðəz nəʊ ˈfiːt/
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• General-American: /ə ˈkloʊzd ˌmaʊθ ˈɡæ.ðɚz noʊ ˈfiːt/
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• US: Recorded audio is listed in the source snapshot.
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From put one's foot in one's mouth (“to say something embarrassing or wrong, or to make a mistake in public, or a social blunder, that is embarrassing or offensive”), adopting the structure of a rolling stone gathers no moss and a closed mouth catches no flies.

4 source translations are retained for this English entry.

• French: ceux qui ne disent rien n’ont jamais tort — one who does not speak can be sure of not saying anything embarrassing
• Portuguese: em boca fechada não entra mosca — one who does not speak can be sure of not saying anything embarrassing
• Serbo-Croatian: šutnja je zlato — one who does not speak can be sure of not saying anything embarrassing
• Spanish: en boca cerrada no entran moscas — one who does not speak can be sure of not saying anything embarrassing