start moving, begin to move, take action, make a move
今日中にホシはきっと動き出す
Hoshi is sure to make a move today.
— High and Low (1963)
ジョージは、列車が動き出すのを感じた。
George felt the train start moving.
まもなく彼は病気が治って動き出すだろう。
He’ll recover from his illness and be up and about soon.