to speak in a low and unclear voice, often when complaining or grumbling to oneself

To mutter or mumble to oneself, often to complain or grumble.

to whisper to one another; the sound of low-voiced chatter or grumbling

to talk in undertones; to whisper or speak softly

to talk in a low voice; to whisper

To speak in a very low voice or whisper; the sound of low, continuous murmuring.

To mumble in whispers or mutter to oneself. Also written as [[嘟嘟囔囔|嘟嘟囔囔|du1 du5 nang1 nang5]].

colloquial expression for mumbling or muttering to oneself continuously, often in complaint