hēng
to groan
to snort; to hum; to croon; humph!
This is an interjection or onomatopoeia — it represents a sound.
哼儿哈儿
hēng r hā r
to hem and haw (loanword)
哼哧
hēng chī
to puff hard (e.g. after running)
哼哼唧唧
hēng hēng jī jī
whining
哼唧
hēng ji
whisper
哼唱
hēng chàng
to hum
哼声
hēng shēng
hum
嗯哼
en hēng
uh-huh
气哼哼
qì hēng hēng
enraged