beach, sea coast, river bank
濱 centers on the edge where land meets water: a beach, sea coast, or river bank.
濱 combines 氵 (water) with 賓, which likely contributes the sound. The character expresses a place where water meets land.
Water 氵 beside a guest 賓: imagine a guest arriving at the water's edge, stepping onto the beach or river bank.
For ヒン, picture a hinge on a gate at the beach: hinge -> ヒン, and the gate opens onto the sea coast.