meet
逅 centers on an encounter, especially an unexpected or chance meeting.
逅 combines the movement radical 辶 with 后, which likely contributes the sound. The character expresses the idea of moving toward an encounter.
The movement radical 辶 wraps around 后, like paths crossing. Picture two people moving along separate roads and unexpectedly meeting at the junction.
For コウ, imagine a chance meeting with a friend named Kou: Kou -> コウ, and you both exclaim 'Kou!' when your paths cross.