HSK 7-9
惨痛
cǎntòng形
bitter; painful; deeply distressed
我们必须记住这次惨痛教训。
Wǒ men bì xū jì zhù zhè cì cǎn tòng jiào xùn.
We must remember this painful lesson.
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Appears across levels (7-9) in the HSK 3.0 word list.