不遗余力

bù yí yú lì

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Definitions

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

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Child Words of 不遗余力

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