朽 — Decay / Rot / Remain In Seclusion

Master (高手)きゅう, く

Radical ⽊ · radical 75 The building block this kanji is filed under

朽 (readings: きゅう, く; Japanese kanji) means “Decay / Rot / Remain In Seclusion”. It is a Jōyō kanji taught in Japanese secondary school (junior & senior high) — the 高手 · Master tier beyond the grade 1–6 Kyōiku set, and appears in words such as 不朽 (immortal).

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What does 朽 mean?

Full details, readings & example

Kanji	朽
Meaning	Decay / Rot / Remain In Seclusion
Readings	きゅう, く
Grade	Master (高手 · secondary school)
Curriculum	Jōyō kanji · Japanese secondary school (JLPT N1–N2)
Example	不朽 (immortal)

How to read 朽

朽 is read きゅう or く depending on the word.

Words with 朽

不朽bất hủ

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Updated: 2026-07-22