たりる
to be enough, to be sufficient
A knee over the foot below it. Here it is about reach: whether what you have gets you as far as the line. Tally たり it up. It does not: たりる.
足りない is the form you meet more often, meaning not enough. 十分 じゅうぶん is having plenty.
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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.