crease
crease
verb
To make a fold or mark in something, or for something to become folded.
"Be careful not to crease the map."
noun
A line or mark made by folding, pressing, or crushing material.
"There was a sharp crease in the letter."
Thesaurus
Synonyms: ruckle, crinkle, scrunch up, scrunch, crisp, wrinkle, furrow, crumple, rumple, creese, kris, seam