- 两手空空 liǎngshǒukōngkōng empty-handedto be left with nothing; to have nothing in one's hands
- 空空如也 kōngkōngrúyě absolutely emptycompletely empty; having nothing at all (often describing a physical space, pocket, or vessel)
- 空空荡荡 kōngkōngdàngdàng absolutely emptyabsolutely empty; deserted; describing a wide open space with nothing in it
- 空空洞洞 kōngkōngdòngdòng emptycompletely empty or bare; wide and vacant (used for physical spaces like rooms or caves)
- 妙手空空 miàoshǒukōngkōng pickpocketpetty thief; sneak thief; pilferer; a person who is quick-fingered at stealing
- 空空儿 kōngkōngr empty-handedbringing nothing; with empty hands, such as when visiting as a guest
- 空空导弹 kōngkōngdǎodàn air-to-air missile
