むだ
wasteful, useless
A packhorse 駄 loaded up and walked all that way through the mud for nothing 無. Whatever was in the bags, nobody wanted any of it: むだ.
Shares 駄 with 駄目, no good. むだ is the effort wasted, だめ is the verdict.
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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.