crease

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

An angular or rounded shape made by folding.

“a crease in his trousers”

A Malayan dagger with a wavy blade.

Become wrinkled or crumpled or creased.

Make wrinkled or creased.

Scrape gently.

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

“crease the paper like this to make a crane”