不遗余力
bùyí-yúlìTraditional 不遺餘力
to spare no effort
Every meaning
bùyí-yúlì
- to spare no effort
Its characters
- 不bùnot; no
- 遗yíto leave behind; to hand down (as in 遗产, 遗传)
- 余yúsurplus; remainder (as in 剩余)
- 力lìforce; strength
Words with 不
Words with 遗
Meanings from our own dictionary. Chengyu from the Xinhua idiom list, the most common first.