early 14c., momelen, "to eat in a slow, ineffective manner" (perhaps "to talk with one's mouth full"), probably frequentative of interjection mum. The -b- is excrescent. Meaning "to speak indistinctly" is from mid-14c. Related: Mumbled; mumbling.
mumble (n.)
1902, from mumble (v.).
例文
1. 「Well,」he conceded,"I do sometimes mumble a bit."
「うん」と彼は認めた。「私は時々言葉がはっきりしないことがある」と。He could hear the low mumble of Navarro 's voice.
彼はナバロが小声でつぶやいているのが聞こえる。
3.For goodness 'sakes,Lucy Marian,speak up!I can 't abide children who mumble .
おとなしい!ルーシー?マリアン、大きな声で話して!私は子供がぶつぶつ言うのが大嫌いです。
4.I wish you wouldn 't mumble I can 't hear you clearly.