long, winding, oblique
逶 centers on a long, winding, or oblique path or shape. The given meanings describe something that extends in a curving, indirect way rather than a straight line.
逶 combines 辶 (movement) with 委, which likely contributes the sound and possibly the idea of something bending or yielding. The exact historical development is uncertain.
The movement radical 辶 wraps around 委, like a path that bends and winds. Picture a long, oblique road that twists around a central obstacle.
For イ, imagine a winding path that is easy (イージー) to follow despite its curves: easy -> イ, and the road stretches long and oblique.
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