darkener

/ˈdɑrkənər/
noun
  1. A substance or device used to make something darker in color.
    • She added a few drops of darkener to the paint to get the right shade.
    • This wood stain is a natural darkener for pine furniture.
    • The makeup artist used a darkener to create a smoky eye look.
Antonyms
What does "darkener" mean? | whatsthatwordmean | whatsthatwordmean