verb. make (more) humid.
Example sentences of the word moisturize
1. Verb, base form
Wash your face daily and moisturize, but use cool water instead of hot, and don't scrub the skin.
2. Noun, singular or mass
Both protect the skin and moisturize.
3. Verb, non-3rd person singular present
Castor's lubricant properties moisturize hair and help to diminish breakage, therefore assisting in its growth.