

| Readings | On-reading | かい |
| Kun-reading | こころよい | |
| Meaning | comfortable / cheerful | |
| Radical |
心(忄⺗)
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| Stroke count | 7 | |
| JLPT Level | N3 | |
Stroke order of 「快」
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Vocabulary contains 「快」
| Word | Meaning |
| 快適な(かいてきな) | comfortable |
| 愉快な(ゆかいな) | pleasant |
| 不快な(ひかいな) | unplesant |

