mumble

vt.

1. 含糊地說，咕噥著說
   When the old lady speaks she often mumbles her words.

   這位老婦人說起話來常常含糊不清。

2. 抿著嘴嚼

vi.

1. 含糊地說話，咕噥
   Stop mumbling, for goodness sake.

   看在老天爺面上，別再咕噥了。