相关单词近義詞 hollow 空的, sunken 沉沒的, depressed 沮喪的, dished 中凹的反義詞convex, 中凸的臨近詞conceal, concatenate, concaver, concaveup, concave up, concave die, concave bow, concaveness, concave key, concave bar, concave saw, concavedown 返回 concavely