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Phonetics
/steɪn/
noun
A discoloured spot or area.
A blemish on one's character or reputation.
A substance used to soak into a surface and colour it.
A reagent or dye used to stain microscope specimens so as to make some structures visible.
Any of a number of non-standard tinctures used in modern heraldry.
verb
To discolour.
Example: armour stained with bloodTo taint or tarnish someone's character or reputation
To coat a surface with a stain
Example: the stained glass used for church windowsTo become stained; to take a stain.
To treat (a microscopic specimen) with a dye, especially one that dyes specific features
To cause to seem inferior or soiled by comparison.