Learn how to say Crumpling correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word crumple:
when intr, often foll by up to collapse or cause to collapse ⇒ his courage crumpled
when tr, often foll by up to crush or cause to be crushed so as to form wrinkles or creases
(intransitive) to shrink; shrivel
a loose crease or wrinkle
C16: from obsolete crump to bend; related to Old High German krimpfan to wrinkle, Old Norse kreppa to contract