防空 fangˊ kongˉ

(Air defence, Anti-aircraft)

Air defence, Anti-aircraft

空洞 kongˉ dongˋ

(Empty, Inane, Meaningless, Shallow)

Empty vastness, Empty, Shallow, Meaningless, Inane

防

Defend, Defensive, Guard, Look after, Protect

Defend, Defensive, Protect, Guard, Look After

空

Air, Bare, Deserted, Empty, Have free time, Hollow, In vain, Sky, Space

Empty, Have free time, Space, Air, Sky, In vain, Bare, Hollow, Deserted

洞

Cave, Cavern, Cavity, Hole, Pierce, See through, Understand, Zero

Cave, Cavern, Hole, Cavity, Pierce, See through, Understand, Zero