mum·ble /ˈmʌmbəl/ ●●○ verb [intransitiveI, transitiveT] SAYto say something too quietly or not clearly enough, so that other people cannot understand you 咕哝,含糊地说 → mutter He bumped into someone and mumbled an apology. 他撞到一个人,咕哝着道了歉。
mumble to yourself A woman on the corner was mumbling to herself. 角落里有个女人在喃喃自语。
► see thesaurus at say —mumble noun [countableC]