唉 On the HSK 7-9 vocabulary list, at CEFR level C2. āi ㄞ interjection or grunt of agreement or recognition (e.g. yes, it's me!) to sigh ài ㄞˋ alas oh dear 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