"smother a yawn" "muffle one's anger" "strangle a yawn"
I was muffled up, to avoid recognition, in a long overcoat with the collar turned up.
They came every morning..muffled in the winter in little anoraks and scarves.
牛津高階第八版
美國韋氏詞典
Dictionary.com
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維基百科 (自由的百科全書)