Stain

боя

boja

(substance used to soak into a surface and colour it)

петно

petno

(discoloured spot or area)

позор

pozor

(blemish on one's character or reputation)

боядисвам

bojadisvam

(to coat a surface with a stain)

обезцветявам

obezcvetjavam

(to discolour something)

позоря

pozorja

(to taint or tarnish someone's character or reputation)