n. (Hira=から) emptiness, state of being empty, condition of not being filled; sky

n. (Trad=空, Pinyin=kong1) air, sky, leisure

adj. (Trad=空, Pinyin=kong1) bare, in vain

n. (Simp=空, Pinyin=kong1) air, sky, leisure

adj. (Simp=空, Pinyin=kong1) bare, in vain

¹ a ball; a handball; a circle; a sphere

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² a gong

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[公] (1) public [official] affairs; public business
(2) a prince; a duke
(3) His [Your] Highness

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[功] (1) merits; services; credit; honor
(2) exertion; efforts; labors

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[空] zero; cipher; naught; nothing; emptiness; vacancy; free of charge

[空-] be ownerless [unattached, free-floating]; lack an owner

[空-] (1) lack an owner
(2) be free-floating

[空-] get for nothing [gratis, free of charge]

[空-] free (of charge); for nothing; gratis; gratuitously; for a song

si1 kong1 jian4 guan4
A common sight for the Minister of Works.
Referring to a common occurrence or sight.

kong1 zhong1 lou2 ge2
A castle in the air.
Meaning something is impossible to carry out. Said of illusions and visionary prospects.

kong1 dong4 wu2 wu4
Hollow and devoid of content.
Describing a writing that has no substance or is divorced from reality.