whitening

/ˈwaɪtənɪŋ/
noun
  1. The process or result of making something white or whiter, especially teeth or skin.
    • She bought a new toothpaste for whitening her teeth.
    • Many people try skin whitening creams, but they can be harmful.
    • The whitening of the old shirt was successful after using bleach.
Antonyms
adjective
  1. Designed to make something white or whiter.
    • This whitening shampoo is supposed to brighten blonde hair.
    • The dentist recommended a whitening treatment for my stained teeth.
    • He uses a whitening toothpaste every morning.