fall apart; the building crumbled after the explosion; Negotiations broke down

[ Syn: crumble , tumble , break down , collapse ]

fold or collapse; His knees buckled

[ Syn: buckle ]

to gather something into small wrinkles or folds; She puckered her lips

[ Syn: pucker , rumple , cockle , knit ]

become wrinkled or crumpled or creased; This fabric wont wrinkle

[ Syn: rumple , wrinkle , crease , crinkle ]