| 凹 | 570C25 40.40 | 部居  | 畫數 5 | ㄠ [ao1] (also *ㄨㄚˋ [wa4] , *ㄧㄠ [yao1] ). | ||
| Adj. | Concave (surface), hollow, depressed: 凸凹 convex and concave; 凹地，凹處 [ao1di4], [ao1chu4]↓ (related 窪 62C.11). | |||||
| Words | 1. 凹版 [ao1ban3], n., a die cut with designs or characters in intaglio. 2. 凹處 [ao1chu4], n., hollow place, depression. 3. 凹地 [ao1di4], n., hollow ground. 4. 凹鏡 [ao1jing4], n., a concave mirror. 5. 凹心臉兒 *[ao1xin1lia3er0], n., a face hollow below the cheekbones. 6. 凹透鏡 [ao1tou4jing4], n., concave lens. 7. 凹瑤兒 *[wa4yao2er0], n., a depression on a plane or surface. | |||||