こうかい
regret
After the event, and the heart goes back over it every single time. Ko こう, Kai かい again, and no use to anybody, and it happens anyway: こうかい.
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Emaki is not affiliated with, or endorsed by, Kaishi 1.5k or its authors. The word, reading and meaning come from the Kaishi 1.5k deck, used with their permission. The mnemonic, the note and the kanji breakdown are original work, published under CC BY-SA 4.0.