tabi, socks, stockings
韈 centers on traditional Japanese split-toed footwear: tabi socks or stockings. The meanings all refer to foot coverings worn with traditional attire.
韈 combines 革 (leather) with 蔑, which likely contributes the sound. The character originally referred to leather foot coverings, consistent with the tabi/socks meaning.
The left side 革 (leather) suggests material, and the right side 蔑 looks like a foot with toes peeking out. Picture leather tabi socks with the big toe separated, ready to wear.
For ベツ, imagine putting on your best tabi socks for a special occasion: best -> ベツ, and your feet are snug in leather socks.