rumbling
鞳 centers on a deep, resonant rumbling sound, often associated with drums or thunder.
鞳 combines 革 (leather) with 荅, which likely contributes the sound トウ. The leather radical suggests a drum, and the character represents the rumbling sound it produces.
Leather 革 on the left hints at a drum, and the right side 荅 looks like a stand with a mouth 口 on top. Imagine beating a leather drum and hearing a deep rumbling sound echo from its mouth.
For トウ, picture a toe tapping on a leather drum, producing a rumbling tone: toe -> トウ.
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