# 系 — Lineage

Frequency rank 668 / 2,608 in published Japanese.

Mid-frequency: not on every page, but regular in books and magazines.

More common than 波 (Wave), less common than 税 (Tax).

- On’yomi: けい
- Kun’yomi: —
- Radical: 糸 Silk (Kangxi 120)
- Frequency path: Level VI of XX

The lineage radical on top trails thread below -- a lineage traced by a single thread of ancestry connecting generations.

In words:

- 系 けい — system;lineage;group
- 系統 けいとう — system,family line,geological formation
- 体系 たいけい — system,organization

[Study 系](https://app.kanjidrift.com/study?kanji=%E7%B3%BB)

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