相关单词同义词hollow, cuppy, 近义词 hollow 空的, sunken 沉没的, depressed 沮丧的, dished 中凹的反义词convex, 中凸的临近词conceal, concatenate, concaver, concaveup, concave up, concave die, concave bow, concaveness, concave key, concave bar, concave saw, concavedown相似词conation, CONCACAF, concatenate, concatenation, conceal, concealer, concealment, concede, 返回 concave