空 U+07a7a 空
Radical: 穴
Decomposition: ⿱穴工
Acjk: 空⿱穴.5工3
Definition: empty, hollow, bare, deserted
索 U+07d22 索
Radical: 糸
Decomposition: ⿳十冖糸
Acjk: 索⿳十2冖2糸.6
Definition: large rope, cable; rules, laws; to demand, to exact; to search, inquire; isolated