放心: set one's mind at rest; be at ease; rest assured; rest one's heart; feel relieved [safe]: 对他不大放心 not quite trust him; 放心不下, 坐卧不宁 be in suspense, unable to sit down or sleep at ease; 看到这样的前
使放心: set ... at ease [rest]: 听说丈夫获救, 这才使她放心了。 she was set at ease by learning that her husband had been saved