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効
効 (readings: こう, き; Japanese kanji) means “effect / effective”. It is a Grade 5 Kyōiku kanji, taught in year 5 of Japanese elementary school, and appears in words such as 効果 (effect).
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What does 効 mean?
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薬が効く。
くすりがきく。The medicine works.
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Full details, readings & example
| Kanji | 効 |
|---|---|
| Meaning | effect / effective |
| Readings | こう, き |
| Grade | Grade 5 (Hard) |
| Curriculum | Kyōiku kanji · Japanese elementary school |
| Example | 効果 (effect) |
How to read 効
効 is read こう or き depending on the word.
Words with 効
- 効果こうかhiệu quả
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Updated: 2026-08-09