- 叽叽咕咕 jījigūgū to mutterto mutter or whisper; used to describe the sound of people talking in low voices
- 咕咕叫 gūgūjiào to rumbleThe sound of an empty stomach rumbling from hunger; to growl or gurgle
- 咕咕唧唧 gūgujījī to whisper or mutterto talk in whispers or grumble in an indistinct voice; to speak softly and continuously
- 唧唧咕咕 jījigūgū to whisperwhispering or murmuring sound; to yap or talk in low tones incessantly
- 嘀嘀咕咕 dídigūgū to mutterTo talk in whispers or mutter to oneself, often with a sense of complaining