みたす
to fill, to satisfy
You fill the thing right the way up, and a set of requirements gets filled in exactly the same way. The same Michiru みた as 満ちる, except that this time somebody did the filling. He does not: みたす.
満ちる みちる is a thing filling up on its own. 満たす is you filling it, or meeting a condition.
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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.