bank, brink, shore, beach
濵 centers on the edge where land meets water: a bank, brink, shore, or beach.
濵 is a variant or simplified form of 濱, which combines 氵 (water) with 賓 (guest, visitor). The original idea may relate to a place where water meets land, like a shore where visitors arrive.
Water 氵 meets a guest-like shape 賔 at the edge: imagine a visitor arriving at the shore, stepping from water onto the beach.
For ヒン, picture a hinge connecting land and water at the shore: hinge -> ヒン, and the beach is the hinge between sea and land.