noun, noun or participle which takes 'suru'
change of mind; changing one's mind
Refers to a change in one's feelings, intention, or decision. Often used with する to mean 'to change one's mind'.
彼は急に気変わりして、旅行をキャンセルした。
He suddenly changed his mind and canceled the trip.
気
Please don't change your mind and see it through to the end.