凹線 Save Sign in to save words Simplified: 凹线 āoxiàn ㄠ ㄒㄧㄢˋ groove Character by character 凹(āo)concave 線(xiàn)thread Other words read āoxiàn In the same tone 凹陷 aoxian with other tones 坳陷 Often confused with aoxian 翱翔 A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0