Refers to the line of descent from ancestors; often used in historical or formal contexts.
彼は名門の世系に生まれた。
He was born into a distinguished lineage.
Can refer to a genealogical chart or the study of family history.
祖父が家の世系を調べている。
My grandfather is researching our family tree.
Standard kanji form for this word.
Compound of 世 (generation, world) and 系 (lineage, system). The exact historical derivation is uncertain, but the word is conventionally associated with family lineage.