- 两手空空 liǎngshǒukōngkōng empty-handedEmpty-handed; figuratively, not receiving anything.
- 空空如也 kōngkōngrúyě emptycompletely empty or devoid of contents; having nothing inside
- 空空荡荡 kōngkōngdàngdàng desertedcompletely empty and deserted
- 空空洞洞 kōngkōngdòngdòng emptycompletely empty or hollow in a physical space
- 妙手空空 miàoshǒukōngkōng empty-handedhaving nothing or being penniless
- 空空导弹 kōngkōngdǎodàn air-to-air missile
