big leather belt
鞶 centers on a large leather belt, specifically a big ornamental belt worn as part of traditional attire.
鞶 combines 革 (leather) with 般, which likely contributes the sound. The character specifically denotes a large leather belt.
The bottom part 革 means leather, and the top part 般 suggests something large or spreading. Picture a wide leather belt wrapped around a formal robe.
For ハン, imagine a big leather belt with a hand-sized buckle: hand -> ハン, and the belt is as wide as your hand.
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