放心fàng∥xīn心情安定,没有忧虑和牵挂{free from worry or concern; set one's mind at rest; rest assured; feel relieved; be at ease}: 你只管～,出不了错{You can rest assured that everything will be all right.}|看到一切都安排好了,他才放了心。{He felt relieved after seeing everything had been well arranged.}