だいいち
number one, first
Whatever else is on the list, this one sits at the top of it. Work, ahead of everything, and the same itch いち as 一 right there at number one: だいいち.
最初 さいしょ is first in time, the beginning of a thing. 第一 is first in importance.
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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.