wū​diǎn

taint

污点 (污點) wū​diǎn
taint noun
a moral blemish or a mark of disgrace on one's reputation

This criminal record became an indelible blemish on his life.

stain noun
a physical spot or mark of dirt or ink

There is a permanent stain on his white shirt.

Frequency

Movie subtitles
4.59 per million appears in 2% of films
Written text
1.17 per million

Sources

Definitions
CC-CEDICT