I. noun
a small linear prominence or depression on a surface
a benign old face netted with wrinkles
Synonyms: corrugation, crease, crinkle, fold, furrow, plica, ridge, rimple, rivel, ruck
Related Word: crow's foot; pleat, pucker
II. verb
Synonyms: crumple 1, crimp, crimple, crinkle, rimple, ruck (up), ||ruckle, rumple, screw, scrunch