Whiten (verb)

1. To make or become white.
2. To bleach or remove color from something.

Origin:

Middle english whiten, from old english hwītan, from hwīt white.

Examples:

1. She whitened her teeth with the special toothpaste.
2. The sun whitened the wood of the fence.
3. The laundry detergent helped to whiten the shirts.
4. The hair was whitened by the hair dye.
5. The dress was whitened by the cleaning solution.