moisturize

verb

(cause to) become moist, especially the skin

Wiktionary

Pronunciation: /ˈmɔɪs.t͡ʃəɹaɪz/

verb

Etymology: Etymology tree English moisture Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ῐ́ζω (-ĭ́zō)bor. Late Latin -izōder. Middle French -iserbor. Middle English -isen English -ize English moisturize From moisture + -ize.

To make more moist.
“moisturize your skin”
To make more humid.