crumple crumple /ˈkrʌmpəl/

verb

1. () Fall apart  ( collapse , break down , crumple , crumble , tumble )
   fall apart
    The building crumbled after the explosion
   the building crumbled after the explosion
    Negotiations broke down
   Negotiations broke down
   
2. Become wrinkled, crumpled or creased  ( crease , crinkle , crumple , rumple , wrinkle )
   become wrinkled, crumpled or creased
    This fabric won't wrinkle
   This fabric won't wrinkle
   
3. To gather something into small wrinkles or folds  ( cockle , crumple , knit , pucker , rumple )
   to gather something into small wrinkles or folds
    She puckered her lips
   She puckered her lips
   
4. Fold or collapse  ( crumple , buckle )
   fold or collapse
    His knees buckled
   His knees buckled