空 U+07a7a 空
Radical: 穴
Decomposition: ⿱穴工
Acjk: 空⿱穴.5工3
Definition: empty, hollow, bare, deserted
射 U+05c04 射
Radical: 寸
Decomposition: ⿰身寸
Acjk: 射⿰身7寸.3
Definition: shoot, eject, issue forth, emit
击 U+051fb 击
Radical: 凵
Decomposition: ⿶凵扌
Acjk: 击⿶扌3凵.2
Definition: strike, hit, beat; attack, fight