さっそく
immediately
Early and fast at once, which is what you say when you are about to do the thing rather than promise it. Sassy さっ sock そく, and the papers are already on their way: さっそく.
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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.