Meaning & readings

smash, break, crush, familiar, popular

On’yomi サイ
Kun’yomi くだ.く、くだ.ける

Origin

This kanji combines the character for stone or rock () on the left with a sound component (卆) on the right that hints at the pronunciation. The stone radical makes sense for the meaning: when you smash or crush something, you're often breaking it into pieces like a stone being shattered. The right component doesn't contribute meaning but signals that the character should be read with a sound roughly like "sai." Over time, the character's meaning expanded from the literal action of breaking stone to the more general sense of crushing or smashing anything, and eventually to the figurative idea of something being familiar or close to people.

AI-generated (claude-haiku-4-5), not yet reviewed. Formation type (automated guess): Phono-semantic (meaning + sound hint).

9 strokes

Components

  • radical left
  • sound hint right

A sound hint component points at the character’s pronunciation, not its meaning — don’t read a meaning into it.

Common words

  • 玉砕 ぎょくさい honorable death; death without surrender
  • 砕く くだく to break (into pieces); to smash
  • 砕石 さいせき crushed stone; macadam
  • 粉砕 ふんさい pulverization; pulverisation
  • 砕ける くだける to break (into pieces); to be broken
  • 火砕流 かさいりゅう pyroclastic flow

Reference

Strokes
9
Kangxi radical
112
Grade
Jōyō (secondary school)
Frequency rank
#1579 (newspapers)
Former JLPT
level 1
Unicode
U+07815