sudden, abrupt, quick
欻 centers on something happening with sudden, abrupt quickness—a swift, unexpected change or action.
欻 combines 炎 (flame) and 欠 (open mouth / lack), likely suggesting a sudden burst like a flame flaring up. The exact historical development is uncertain.
Two fires 炎 on the left and an open mouth 欠 on the right: imagine a sudden, abrupt flare-up that makes you gasp—quick and unexpected.
For クツ, picture a sudden flame that makes you shout "kuts!"—an invented sharp sound like a quick gasp: kuts -> クツ, matching the abruptness of the kanji.
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