take, hoist, pull out, shrink
搴 centers on pulling something upward or outward with force: taking, hoisting, or extracting. The shrink sense is a less common extension, possibly from pulling something tight or drawing it in.
搴 combines 手 (hand) with a phonetic element that likely contributed the sound ケン. The character expresses pulling or extracting by hand.
The hand 手 at the bottom is pulling something out from under a roof-like cover 宀. Imagine hoisting a heavy object from a container.
For ケン, picture a strong man named Ken hoisting a heavy load with his bare hands: Ken -> ケン, and he pulls it out with effort.