HSK 7-9
坎坷
kǎnkě形
(of a road) bumpy; (of life) rough; to be down on one's luck; to be full of frustrations and dashed hopes
他经历坎坷仍没有放弃理想。
Tā jīng lì kǎn kě réng méi yǒu fàng qì lǐ xiǎng.
He endured a difficult life but never gave up his ideals.
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Appears across levels (7-9) in the HSK 3.0 word list.