yǎo

to bite / to nip

yǎoyá

to clench one's teeth / to grind the teeth / gnaw

sīyǎo

to tear at (with the teeth, like one animal attacking another)

yǎohé

(of uneven surfaces) to fit together / (of gear wheels) to mesh / (dentistry) occlusion / bite

gǒuyǎogǒu

dog-eat-dog / dogfight

yǎoréngǒurbùlùchǐ

lit. the dog that bites does not show its fangs (idiom) / fig. You can't tell the really dangerous enemy from his external appearance.

yīzhāobèishéyǎo,shíniánpàjǐngshéng

once bitten by a snake, ten years in fear of a well rope / once bitten, twice shy (idiom)

yǎochúnzhuāng

bitten-lips look (darker lipstick applied on the inner part of the lips, and lighter on the outer part)

dīngyǎo

sting / bite (of insect)

yǎoshāng

bite (e.g. snake bite, mosquito bite)