calzón
/kalˈθon/ · B2 · noun · m
female undergarment, panties, knickers
🩲 calzón = calza (leg-covering) + -ón (big): a big leg-covering piece
Calzón comes from calza, an old word for leg coverings like breeches, plus the augmentative -ón. Spanish calzones were once large breeches, and the word later narrowed to underpants. Link calz- with calzoncillos and calcetín, which also cover the lower body.