crumple
verb uk/ˈkrʌm.pəl/ us/ˈkrʌm.pəl/
[ I or T ]（使）起皱
to become, or cause something to become, full of folds that are not equal in size
This shirt crumples easily 这件衬衫很容易起皱。
[ I ]（脸因强烈的感情）起皱纹
If someone's face crumples, it becomes full of lines because of a strong emotion.
Her face crumpled with laughter. 她笑得脸上尽是皱纹。
[ I ]倒下;瘫倒
If someone crumples, they fall to the ground suddenly.
The bullet hit him and he crumpled into a heap on the floor. 他中了弹，瘫倒在地上蜷作一团。
Phrasal verb
crumple something up 把…揉皱；把…揉成一团
to crush a piece of paper until all of it is folded
Sylvie crumpled up the letter and threw it in the bin. 西尔维把信揉成一团扔进了垃圾箱。