源源不斷 Save Sign in to save words Simplified: 源源不断 On the HSK 7-9 vocabulary list, at CEFR level C2. yuányuánbùduàn ㄩㄢˊ ㄩㄢˊ ㄅㄨˋ ㄉㄨㄢˋ in an unending stream continuous idiom Character by character 源(yuán)root 源(yuán)root 不(bù)no 斷(duàn)break 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