discolor

verb

Change or cause to change to a different, less attractive colour.

SYNONYMS

blackenblackenedbleachbleachedblemishchardirtydisfigurefadefadedmake dirtymarmarkmarkedoxidizedrustrustedrustysmearsoilsoiledspoilspotspottedstainstainedstreaksullytarnishtarnishedwash outweatherweatheredyellowed