IPA: //ˈmɔɪstənər//
KK: /ˈmɔɪstənər/
An item or product that adds moisture, often used in cosmetics or skincare to keep the skin hydrated.
She applied a moisturizer to her face every morning to keep her skin soft and smooth.
Moistener → It is formed from "moist" (from Old French *moiste*, meaning slightly wet or damp) and "-ener" (a suffix indicating a person or thing that performs a specific action). The word "moistener" refers to something that makes or keeps something else moist.
Think of something that makes things 'damp' or 'wet' — 'moist' means slightly wet, and '-ener' indicates it does that action.