14 letters · 18 points in Scrabble
noun a garment worn under other garments
originVictorian Era euphemism, specifically the category of euphemism known as indirection (compare privates, behind, sleep together). First intended meaning was "trousers", attested from 1823. Meaning "underwear" is recorded from 1910.
Etymology from Wiktionary, CC BY-SA 3.0