corrugated paper or cardboard; a wavy thick paper board typically used for making shipping boxes and packaging fragile items

(bound form) an edible mollusk with a thick, ridged shell found in shallow waters; also known as [[蚶子|蚶子|han1 zi5]] or [[蚶|蚶|han1]]

(literary) A soft hat with a vertical indentation in the middle, typically worn by common people in ancient China; also called [[瓦楞帽子|瓦楞帽子|wa3 leng2 mao4 zi5]].

type of headwear with ridges in the middle, typically worn by ordinary people in ancient China