苦練 Save Sign in to save words Simplified: 苦练 On the HSK 7-9 vocabulary list, at CEFR level C2. kǔliàn ㄎㄨˇ ㄌㄧㄢˋ to train hard to practice diligently hard work blood, sweat, and tears Character by character 苦(kǔ)bitter 練(liàn)practice A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT