shoes, boots
鞜 centers on footwear made from leather: shoes and boots. The meanings are straightforward applications of leather footwear.
鞜 combines 革 (leather) with 沓, which likely contributes the sound and relates to overlapping or layering, suggesting leather footwear.
Leather 革 combined with 沓, which looks like water over a sun, can be imagined as leather shoes splashing through puddles on a sunny day.
For トウ, picture a toe slipping into a leather shoe: toe -> トウ, and the shoe fits perfectly.