かいけつ
solution, settlement
You untie the knot first and then decide the thing so that it stays decided. The trouble is finally over and Kai かい has put the kettle けつ on: かいけつ.
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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.