IPA: /ˈpliːtləs/
KK: /plitləs/
Describing a fabric or garment that does not have any folds or pleats.
She wore a pleatless dress to the party, which looked very elegant.
Pleatless → It is formed from "pleat" (from Old French *plis*, meaning fold) and "-less" (meaning without). The word "pleatless" means without pleats or folds.
Think of 'pleat' as a 'fold' and remember that 'pleatless' means without any folds.