①relief：
一听到消息,他如释重负地松了口气.
Hearing the news,he breathed a sigh of relief.
②release：
考试之后,我感到如释重负.
After my examination I had a feeling of release.
③weight off：
那真叫我如释重负.
That's quite a weight off my mind.
我还了抵押借款,如释重负!
Paying my mortgage was an enormous weight off my mind!