Word: 指甲 (zhǐjia)

不要再咬指甲了。

Búyào zài yǎo zhǐjia le.

Stop biting your nails.

咬指甲是个坏习惯。

Yǎo zhǐjia shì gè huài xíguàn.

Biting your fingernails is a bad habit.

她有咬指甲的习惯。

Tā yǒu yǎo zhǐjia de xíguàn.

She has a habit of biting her nails.

我一面咬着指甲一面担心着你。

Wǒ yímiàn yǎozhe zhǐjia yímiàn dānxīnzhe nǐ.

I was biting my nails, worrying about you.

我的指甲断了。

Wǒ de zhǐjia duànle.

I broke a nail.