Discolor (verb)

Cause to lose its natural color or become discolored.

Origin:

Late middle english (as a noun denoting a change in color): from old french descolorer, based on latin dis- "away" + colorare "to color".

Examples:

1. The coffee had discolored the white cup.
2. The water from the old pipes discolored the laundry.
3. The exposure to the sun discolored the painting.
4. The discoloration of the leaves indicated that the plant was sick.
5. The bleach discolored the carpet.