catch
丮 centers on the action of catching or grasping something, like seizing an object with the hand.
The exact historical development of 丮 is uncertain. It may be an ancient pictograph of a hand grasping something, but the modern form is too abstract to confirm.
The outer hook ⺄ looks like a curved hand reaching out, and the inner vertical stroke is the object being caught. Imagine a hand closing around a stick to catch it.
For ケキ, imagine a quick, sharp 'keki' sound as your hand snaps shut to catch a falling object: keki -> ケキ.