身空 is read as みそら (misora) and means body.
みそら
misora
からみ
traveling alone and with little luggage (travelling)
しんだい
body
しんちょう
height (of body)
み
one's body
みぶん
one's circumstances
みもと
(one's) character
みうち
one's whole body
みのまわり
one's personal belongings
みぢか
near oneself
みのうえ
one's lot
みより
relative
みなり
dress