ふかのう
impossible
Three characters stacked up and every one of them saying no. The same can かのう as 可能, with a foo ふ in front of it cancelling the lot. That report, in a day: ふかのう.
可能 かのう is possible, and 不 on the front is the usual way of turning a word round. 無理 むり is the everyday impossible, and it also covers unreasonable and overdoing it.
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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.