mouth
US /maʊθ/
UK /maʊθ/
1.
the opening in the lower part of the human face, surrounded by the lips, through which food is taken in and from which speech and other sounds are emitted
:
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He opened his mouth to speak.
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She put a spoonful of soup into the baby's mouth.
1.
to speak or utter (something) especially in a pompous or insincere way
:
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He just mouthed platitudes without any real conviction.
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Don't just mouth the words; understand their meaning.