不遗余力 (bù yí yú lì) | Meaning: to spare no pains or effort (idiom); to do one's utmost | Chinese Idiom with Pinyin & Origin

(idiom) to make an all-out effort全力以赴quán lì yǐ fù

the whole nest came out (idiom); to turn out in full strength倾巢而出qīng cháo ér chū

to do one's utmost竭力jié lì

to spare no effort (idiom); to do one's utmost尽心竭力jìn xīn jié lì

to spare no pains or effort (idiom); to do one's utmost