如释重负

as if relieved from a burden (idiom) / to have a weight off one's mind

as / as if / such as

to explain / to release / Buddha (abbr. for 釋迦牟尼|释迦牟尼[Shi4 jia1 mou2 ni2]) / Buddhism

to repeat / repetition / again / re- / classifier: layer

heavy / serious / to attach importance to

heavy load / heavy burden (also fig. of tax)

to bear / to carry (on one's back) / to turn one's back on / to be defeated / negative (math. etc)