HSK 7-9
甘心
gānxīn动
to be willing to; to resign oneself to
他不甘心让多年努力白费。
Tā bù gān xīn ràng duō nián nǔ lì bái fèi.
He was unwilling to let years of effort go to waste.
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Appears across levels (7-9) in the HSK 3.0 word list.