[chǐ]
[名]
（牙； 牙齒） tooth
molar [incisor， canine， milk] tooth
臼[門， 犬， 乳]齒
dare not mention a subject
不敢啟齒
grin
露齒而笑
（物體上齒形的部分） a tooth-like part of anything
the teeth of a saw
鋸齒兒
the teeth of a comb
梳齒兒
[書] （年齡） age
seat guests according to seniority
序齒
very young
稚齒
[動]
[書] （說到； 提起） mention
do not regard as a human being
不齒人類
not worth mentioning; of no importance
不屑齒及