体からだが空あく

expression, godan verb (-ku)

become free; get time off

Idiomatic expression meaning one's schedule opens up or one becomes available. Often used when a prior commitment is cancelled or a task is finished.

• 会かい議ぎが早はやく終おわったので、午ご後ごは体からだが空あいた。

  The meeting ended early, so I became free in the afternoon.