Underwear (noun)

1. Clothes worn next to the skin under outer clothes.
2. Clothes worn for warmth or protection against the elements, typically next to the skin.

Origin:

Early 19th century: from under- (expressing position below or lower than something else) + wear.

Examples:

1. He changed into fresh underwear.
2. She washed her underwear.
3. The store sells men's underwear.
4. The company produces high-quality underwear.
5. The children outgrew their underwear.