oppress, extort, take by force
掯 centers on using power to take from others against their will: oppressing, extorting, or seizing by force.
掯 combines 扌 (hand) with 肯, which likely contributes the sound and may relate to forceful action. The exact historical development is uncertain.
The hand radical 扌 beside 肯 suggests a hand using force to take something. Picture a hand gripping tightly and extorting valuables.
For コウ, imagine a hand forcing someone to hand over their coat: coat -> コウ, and the hand oppresses them until they give it up.