Underthings (noun)

Clothing worn next to the skin and under other clothing, such as underwear and lingerie.

Origin:

From under- (below) + things (items).

Examples:

1. She folded her underthings and put them in the drawer.
2. He bought her a new set of underthings for their anniversary.
3. She washed her underthings before going on a trip.
4. His underthings were comfortable and soft.
5. She chose her underthings carefully to match her outfit.