HSK 4
空
kòng动形名
free time; spare time; vacant; unoccupied; to vacate
我下午有空可以帮你搬家。
Wǒ xià wǔ yǒu kòng kě yǐ bāng nǐ bān jiā.
I am free this afternoon and can help you move.
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Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 4.