きおく
memory
Everything from back then is still filed in the same oak おく box at the back of the drawer as 奥, and all of it still sharp: きおく.
The stored thing. 覚える おぼえる is the act of putting it there.
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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.