こいびと
lover, sweetheart
The person 人 your heart is tangled round 恋, the coy sort rather than the settled sort, and a different word from the one you married. He lost his: こいびと.
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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.