crease

nouns

an angular or rounded shape made by folding
"a fold in the napkin"; "a crease in his trousers"; "a plication on her blouse"; "a flexure of the colon"; "a bend of his elbow"
a slight depression in the smoothness of a surface
"his face has many lines"; "ironing gets rid of most wrinkles"
a Malayan dagger with a wavy blade

verbs

make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in
"The dress got wrinkled"; "crease the paper like this to make a crane"
make wrinkled or creased
"furrow one's brow"
scrape gently
"graze the skin"
become wrinkled or crumpled or creased
"This fabric won't wrinkle"