discolor
verb
- to (cause to) have an undesirable color
Wiktionary
Pronunciation: /dɪsˈkʰʌlə(ɹ)/
verb
Etymology: From Middle English discoloren, discoloren, from Old French descolorer, discolorer, equivalent to dis- + color.
- To change or lose color.
“Washing light laundry with dark may cause your clothes to discolor.”
“A bad enough bruise can discolor the skin.”