Meaning & readings

lineage, system

On’yomi ケイ

Origin

This character combines two elements to represent a connected line of descent or organization. The top part, a slant stroke, represents a thread or line being pulled, while the bottom part is the character for thread or silk (糸). Together, these components suggest a continuous thread linking things together—much like how family members are connected through lineage, or how individual elements are woven into a system. The image of thread continuing unbroken captures both the idea of ancestry passing down through generations and the concept of an interconnected whole.

系 7 strokes

Components

  • 丿 radical top
  • 糸 radical bottom

Common words

  • 家系 かけい family lineage
  • 系図 けいず family tree; pedigree
  • 系統 けいとう system
  • 系譜 けいふ genealogy; lineage
  • 系列 けいれつ series; sequence
  • 体系 たいけい system; organization
  • 直系 ちょっけい direct descent; direct line
  • 日系 にっけい (of) Japanese descent

Easily confused with

These look alike but are unrelated in meaning — check the stroke that differs.

Reference

Strokes
7
Kangxi radical
120
Formation type
Compound ideographic (combined meanings)
Grade
Grade 6 (Kyōiku)
Frequency rank
#567 (newspapers)
Former JLPT
level 1
Unicode
U+07CFB