discolor
[verb]
Synonyms: taint, besmear, besmirch, defile, smear, soil, stain, sully, tar, tarnish, bestain, blot, smut
[adjective]
Synonyms: variegated, dappled, motley, multicolor, multicolored, multihued, parti-colored, varicolored, versicolor, versicolored

[TahlilGaran] English Synonym Dictionary ▲

I. dis‧col‧or /dɪsˈkʌlə $ -ər/ verb [I, T]
the American spelling of discolour

[TahlilGaran] Dictionary of Contemporary English ▲

II. dis‧col‧our British English, discolor American English /dɪsˈkʌlə $ -ər/ verb [intransitive and transitive]
to change colour, or to make something change colour, so that it looks unattractive:
Once cut, apples quickly discolour.

[TahlilGaran] Dictionary of Contemporary English ▲