storm around, be crazy
獗 centers on wild, uncontrolled behavior: storming around or acting crazy, like a beast in a frenzy.
獗 combines the animal radical 犭 with 厥, which likely contributes the sound. The exact historical development is uncertain, but the character is associated with wild, beast-like behavior.
A wild beast 犭 on the left, and a chaotic, stormy shape 厥 on the right: imagine a crazed animal rampaging around.
For ケツ, picture a kettle (ケツ) boiling over wildly, steam storming around like a crazy beast.
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