meander
涒 centers on winding, indirect movement, like a river that meanders through a landscape.
涒 combines 氵 (water) with 君, which likely contributes the sound. The exact historical development is uncertain.
Water 氵 beside a lord 君: imagine a lord's lazy river that meanders through his estate instead of flowing straight.
For トン, picture a ton of water meandering slowly: ton -> トン, and the heavy water twists and turns.