wrinkle

Gather or contract into wrinkles or folds; pucker.

Become wrinkled or crumpled or creased.

“This fabric won't wrinkle”

Make wrinkled or creased.

Make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic.

“The dress got wrinkled”

A slight depression or fold in the smoothness of a surface.

“ironing gets rid of most wrinkles”

A clever method of doing something (especially something new and different).

A minor difficulty.

“they finally have the wrinkles pretty well ironed out”