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Kotomora

系

lineage, system

JLPTN1StatusJōyō · grade 6FrequencyTop 1,000Strokes7

Readings

On'yomi

  • ケイ

Kun'yomi

—

Meaning

系 centers on connected lines of descent or organization: a lineage, family line, or a structured system of related parts.

Most common words using 系

20 of 370
  • 系けい
    N1

    system; lineage; group

  • 系列けいれつ
    N1

    series; sequence; system; succession

  • 系統けいとう
    N2

    system

  • 体系たいけい
    N2

    system; organization; organisation; architecture

  • 理系りけい
    N3

    the sciences; STEM (science, technology, engineering and mathematics)

  • 家系かけい
    N1

    family lineage

  • 日系にっけい

    (of) Japanese descent

  • 文系ぶんけい
    N2

    humanities, social sciences, and fine arts; liberal arts

  • 太陽系たいようけい

    solar system

  • 系譜けいふ

    genealogy; lineage; family tree; pedigree

  • 銀河系ぎんがけい

    Milky Way galaxy; Milky Way; the Galaxy

  • 直系ちょっけい

    direct descent; direct line

  • 水系すいけい

    water system; river system; drainage system

  • 女系じょけい

    female line; matrilinear

  • 同系どうけい

    affiliated; akin

  • 系図けいず

    family tree; pedigree; genealogy

  • 男系だんけい

    male lineage

  • 山系さんけい

    mountain range; mountain system

  • 大系たいけい

    outline; survey; compendium

  • 父系ふけい

    paternal line; father's side of the family

Explore all words using 系 →

Study

Etymology

系 combines a top stroke 丿 with 糸 (thread), suggesting a thread that connects or ties together, extended to lineage and systems.

Meaning mnemonic

The top stroke 丿 is like a hook or knot, and 糸 is thread. Picture a thread hanging down from a knot, linking generations in a family line or connecting parts of a system.

Reading mnemonic

For ケイ, imagine a long family line stretching like a cable: cable -> ケイ, and the thread of lineage keeps everyone connected.