すく
to be empty, to become less crowded
Not one seat gone but half of them, and the whole room breathes out. The restaurant at four on a Tuesday, and you could scoot すく right across it: すく.
The same characters read あく mean a single spot coming free. すく is the place thinning out, and it is the すく in お腹が空く.
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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.