n. 25B6; noun the taint of corruption : TRACE, touch, suggestion, hint, tinge; stain, blot, blemish, stigma, black mark, blot on one's escutcheon; discredit, dishonour, disgrace, shame.
25B6; verb
the wilderness is tainted by pollution : CONTAMINATE, pollute, adulterate, infect, blight, spoil, soil, ruin, destroy; poetic/literary befoul.
fraudulent firms taint our firm's reputation : TARNISH, sully, blacken, stain, blot, blemish, stigmatize, mar, corrupt, defile, soil, muddy, damage, harm, hurt; drag through the mud; poetic/literary besmirch.
clean, improve.