discoloring

/D IH0 S K AH1 L ER0 IH0 NG/
verb
  1. 1

    To change or lose color.

    โ€œWashing light laundry with dark may cause your clothes to discolor.โ€

noun
  1. 1

    Discoloration

Source: https://en.wiktionary.org/wiki/discolor, https://en.wiktionary.org/wiki/discoloring