不遗余力

bù yí yú lì

Definitions

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

Child Words of 不遗余力

• 不 bù: no; not so
• 力 lì: power
• 余 yú: extra
• 遗 yí: (bound form) to leave behind
• 余力 yú lì: energy left over (to do sth else)