Stain

kleurstof

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

skandvlek

(blemish on one's character or reputation)

toetskleurstof

(reagent or dye used to stain microscope specimens so as to make some structures visible)

vlek

(discoloured spot or area)

bevlek

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

verkleur

(to discolour something)