hollow, sunken

konkav

concavo

concave

cóncavo

218 Round, square, surface 圆, 方, 表面 (yuán, fāng, biǎomiàn) hollow, sunken 1 凹 [-] āo (concave) hollow, sunken: ~进去 concave, dent, cave in || 这 张床中间~下去了. This bed sags in the middle. '

Goethebuch	Vietnamese

Oxford3000Ten

GLOSSIKA