the roaring of wild beasts, to howl, to wail, to bawl
嘷 centers on loud, wild vocalizations: the roaring of beasts, howling, wailing, or bawling. It describes intense, often animalistic cries.
嘷 combines 口 (mouth) with 臯, which likely contributes the sound and is associated with calling out or loud noise. The exact historical development of 臯 is uncertain.
The mouth 口 on the left and the complex 臯 on the right suggest a wide-open mouth emitting a powerful, echoing roar. Picture a beast with its mouth agape, howling into the wild.
For コウ, imagine a beast letting out a deep, echoing 'cooow' sound that rises into a howl: cooow -> コウ, and the roar fills the air.