kōng​kōng

empty

空空 kōng​kōng
empty adjective
completely empty; vacant; void
in vain
for nothing; in vain; futile
[unreality]
(Buddhism) the unreality of the concept of unreality itself; emptiness of emptiness
sincere and guileless
(literary) the appearance of being humble, sincere, or simple and honest
air-to-air
air-to-air (used for missiles)

Frequency

Movie subtitles
1.46 per million appears in 1% of films
Written text
4.38 per million

Sources