咬牙 [－－]

Jyutping ngaau5 ngaa4
Pinyin yǎo yá

Definitions (CC-CEDICT)
  1. to clench one's teeth
  2. to grind the teeth
  3. gnaw
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. verb
    to grind one's teeth (in sleep)
  2. verb
    to grit one's teeth; to gnash one's teeth
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）