おとす
to drop
The same grass and water on their way down as 落ちる, except that this time a hand let go of it. Phone, step, pavement: oh お, toss とす: おとす.
落ちる おちる is it falling. 落とす is you dropping it, and it also covers losing something.
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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.