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Pronunciation varies by accent · noun
The call of the toadfish, produced by the male through rapid contraction of the sonic muscle against the swim bladder.
Use boat whistle when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Boat whistle means The call of the toadfish, produced by the male through rapid contraction of the sonic muscle against the swim bladder.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use boat whistle where its definition matches the intended context.
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