Stain

chiazza

(discoloured spot or area)

macchia

(discoloured spot or area)

mordente

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

patacca

(discoloured spot or area)

tinta

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

colorare

(to treat a microscope specimen with a dye)

intaccare

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

macchiare

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

mordenzare

(to coat a surface with a stain)