soar, roam
翺 centers on moving through the air or space freely: soaring high or roaming widely.
翺 combines 臯 (likely contributing sound) with 羽 (wings), suggesting the idea of soaring or flying. The exact historical development is uncertain.
The right side 羽 means wings, and the left side 臯 looks like a tall platform. Imagine a bird spreading its wings from a high perch to soar and roam the sky.
For コウ, picture a hawk soaring high above: hawk -> コウ, and the bird's wings carry it far.