means A cosmetic cream or lotion applied to the skin to add or seal in water and prevent dryness.

from Built straight from English: "moisture" plus the verb-making suffix "-ize" (yielding "moisturize," to make moist) and the agent ending "-er" — the thing that does the moisturizing. "Moisture" itself traces back through Old French "moiste" to a Latin source, likely "mucidus" (moldy, slimy) tangled up with "musteus" (fresh, like new wine). The word "moisturizer" is a modern product-marketing coinage of the 20th century, born when the beauty industry needed a noun for the bottle.