/ˈmʌmbl ||; ˈmʌmbḷ/verb [I,T] to speak quietly without opening your mouth properly, so that people cannot hear the words 含糊或叽里咕噜地说；咕哝: I can't hear if you mumble. 你叽里咕噜的话，我听不清你在说什么。 ☞Look at mutter. 参看mutter。