子集合 Save Sign in to save words zǐjíhé ㄗˇ ㄐㄧˊ ㄏㄜˊ subset math. Character by character 子(zǐ)son 集(jí)gather 合(hé)close A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0