费尽心思

fèi jìn xīn si

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Definitions

1. to rack one's brains (idiom); to take great pains to think sth through

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Child Words of 费尽心思

• 尽 尽 jǐn: to the greatest extent
• 心 心 xīn: heart
• 心思 心思 xīn si: mind
• 尽 尽 jìn: to use up
• 费 费 fèi: to cost
• 思 思 sī: to think
• 尽心 尽心 jìn xīn: with all of one's heart