Home / Vocabulary / 系 系 Kanji meanings and readings 系 N1 lineage; system On readingケイ Kun reading Radical糸 Related vocabulary ✦Illustration in preparation 体系 N2 たいけい system; organization ✦Illustration in preparation 系 N1 けい system; lineage; group ✦Illustration in preparation 系統 N2 けいとう system; family line; geological formation