不為人知 Save Sign in to save words Simplified: 不为人知 On the HSK 7-9 vocabulary list, at CEFR level C2. bùwéirénzhī ㄅㄨˋ ㄨㄟˊ ㄖㄣˊ ㄓ 男 女 not known to anyone secret unknown Character by character 不(bù)no 為(wéi)as (in the capacity of) 人(rén)person 知(zhī)know 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