囓〔啮〕 {niè}

1. to gnaw
2. to erode

嚙〔啮〕 jit⁶ {niè}

1. to gnaw
2. to erode

齧牙〔啮-〕 ngit⁶ ngaa⁴ {niè yá}

to grind one's teeth; to gnaw one's teeth

嚙齒〔啮齿〕 jit⁶ ci² {niè chǐ}

a rodent (rat, rabbit etc)

嚙合〔啮-〕 jit⁶ hap⁶ {niè hé}

1. (of opposing teeth, or gears) to mesh
2. to engage

嚙齒類〔啮齿类〕 jit⁶ ci² leoi⁶ {niè chǐ lèi}

rodents (rat, rabbit etc)

嚙齒目〔啮齿-〕 jit⁶ ci² muk⁶ {niè chǐ mù}

order of rodents (rats, squirrels etc)

嚙齒動物〔啮齿动-〕 jit⁶ ci² dung⁶ mat⁶ {niè chǐ dòng wù}

rodent