verb (used with object)
to add or restore moisture
to (something): to moisturize one's skin with lotion; to moisturize air.
verb (used without object)
to make something moist
; counteract a dry condition with moisture
: a skin cream that moisturizes while you sleep.
Also, especially British, mois·tur·ise.
de·mois·tur·ize, verb (used with object), de·mois·tur·ized, de·mois·tur·iz·ing.