回天

to reverse a desperate situation

to circle / to go back / to turn around / to answer / to return / to revolve / Hui ethnic group (Chinese Muslims) / time / classifier for acts of a play / section or chapter (of a classic book)

to curve / to return / to revolve

variant of 迴|回[hui2]

day / sky / heaven

(idiom) nothing can be done to remedy the situation; beyond recovery

unable to turn around a hopeless situation (idiom) / to fail to save the situation