adverb, verb · having nothing in one's hands; being unarmed

他空手夺下了歹徒手中的匕首。

verb · performing painting or embroidery without following a pre-existing model or pattern

这位画家能空手在墙上绘制精美的壁画。

adjective · abbreviation for the Japanese martial art karate (空手道 kōng​shǒu​dào)

他在学校加入了空手社团。