Word: 苦 (kǔ) 苦 dictionary entry kǔ bitter; hardship; pain; to suffer; to bring suffering to; painstakingly Full dictionary entry for 苦 Example sentences using 苦 2 sentences, showing page 1 of 1. 他一生为急性疼痛所苦。 Tā yìshēng wèi jíxìng téngtòng suǒ kǔ. He's suffering from acute pain in his life. 这颗苹果很苦。 Zhè kē píngguǒ hěn kǔ. The apple is bitter.