diàn​wū

stain

玷污 diàn​wū
stain verb
to make something physically dirty or marked with spots

Muddy water stained her white dress.

sully verb
to damage or disgrace a reputation, honor, or purity

This dishonest behavior tarnished his reputation.

Frequency

Movie subtitles
4.68 per million appears in 2% of films
Written text
1.43 per million

Sources

Definitions
CC-CEDICT