Kanji: 空

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JLPT Level:	JLPT N4 (upper beginner level)
Kanken Level:	Kanken Level 10 (learned at completion of 1st grade)
Grade:	Taught during the 1st grade in Japan
Radical:	穴 Radical name: あな
Meaning:	Empty, sky, void, vacant, vacuum
Usage:	Appears frequently in Japanese newspapers, but about 300 kanji are used even more often.

JLPT Level	Word	Meaning
N5	空(そら)	Sky
N4	空(あ)く	to open, to become empty
N4	空気(くうき)	air, atmosphere
N4	空港(くうこう)	airport
N3	空(あ)き	room, time to spare, emptiness
N3	空(から)	sky
N3	航空(こうくう)	aviation, flying
N3	空(す)く	(1) to open, to become empty, (2) to be less crowded
N2	架空(かくう)	aerial, overhead, fiction, fanciful
N2	空(から)っぽ	empty, vacant, hollow
N2	空想(くうそう)	daydream, fantasy, fancy, vision
N2	空中(くうちゅう)	sky, air
N2	真空(しんくう)	vacuum, hollow, empty
N1	空間(あきま)	vacancy, room for rent or lease
N1	大空(おおぞら)	heaven, firmament, the sky
N1	空腹(くうふく)	hunger
N1	上空(じょうくう)	sky, the skies, high-altitude sky, upper air
N1	空(むな)しい	vacant, futile, vain, void, empty, ineffective, lifeless