小狗在泥地里打滚，弄脏了新买的毯子。

The puppy rolled in the mud and ___dirtied the new blanket.

这些谣言玷污了他的名声。

These rumors ___dirty his reputation.

那些不良朋友的言行渐渐玷污了他原本纯真的心灵。

The words and actions of those bad friends slowly ___tainted his originally innocent heart.