wind, walk out of straight path
迆 centers on movement that deviates from a straight line: winding, meandering, or walking out of a direct path.
迆 combines 辶 (movement) with 也, which likely contributes a winding or extending sound-meaning. The exact historical development is uncertain.
The movement radical 辶 wraps around 也, like a path that twists and turns instead of going straight. Picture a winding road that walks out of a straight line.
For イ, imagine an eel winding through the water: eel -> イ, and its body curves out of a straight path just like 迆.