不遗余力
Traditional form:
不遺餘力
Pinyin (reading):
bùyíyúlì
Definitions:
- to spare no pains or effort (idiom); to do one's utmost
Characters:
- 不 - no, not, un-; negative prefix
- 遗 - to lose; a lost article
- 余 - surplus, remainder; surname
- 力 - strength, power; capability, influence
Traditional characters: