litter

n. 垃圾,杂乱
v. 乱丢垃圾,弄乱

Our cat has a litter of four kittens.

我们家的猫一窝养了4只小猫。

He was fined for littering on the sidewalks.

他因在人行横道上乱扔杂物而被罚款。