crinkle

Universal Words verb, noun verb to become covered with or to form a lot of thin folds or lines, especially in skin, fabric, or paper: [V] He smiled, his eyes crinkling. * Her face crinkled up in a smile. * The pages crinkled and curled and turned to ashes in the fire. [also VN] noun a very thin fold or line made on paper, fabric or skin: There were crinkles at the corner of her eyes when she smiled.