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”

become wrinkled or crumpled or creased

make wrinkled or creased

scrape gently

a Malayan dagger with a wavy blade

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”