gū​nong

grumble

咕哝 (咕噥) gū​nong
grumble verb
to complain or express dissatisfaction in a low voice

Dissatisfied with the company's decision, he was muttering to himself all day.

mumble verb
to speak in a low, quiet, or indistinct way

He muttered a few words in his sleep and then rolled over and fell back asleep.

Frequency

Movie subtitles
1.10 per million appears in 0% of films
Written text
0.428 per million

Sources

Definitions
CC-CEDICT