one-legged monster, walrus
夔 refers to a mythical one-legged monster, and by extension a walrus, likely due to a perceived visual or conceptual resemblance.
夔 is an ancient character depicting a mythical one-legged creature. The modern form is complex and its exact historical development is uncertain.
The top 丷 looks like two horns, and the bottom 夒 is a tangled, beast-like shape. Picture a horned, one-legged monster stomping around.
For キ, imagine a key unlocking a cage holding the one-legged monster: key -> キ, and the monster is freed.