CEDICT
Wiktionary
不携带物件。《三国演义.第五○回》:「独云长不获一人一骑,空身回见玄德。」《初刻拍桉惊奇.卷三》:「每日午饭已毕,便空身走去山裡寻几个麞鹿兽兔还家。」也作「罄身」。
重編國語辭典
I want him to do it alone.
Source: Tatoeba
He was alone.
He was alone at the time.
She promised not to go out alone.