不遗余力 Save Sign in to save words Traditional (Taiwan): 不遺餘力 bùyíyúlì ㄅㄨˋ ㄧˊ ㄩˊ ㄌㄧˋ to spare no pains or effort (idiom) to do one's utmost Character by character 不(bù)no 遗(yí)leave behind 余(yú)surname Yu 力(lì)surname Li A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0