to obtain by hook
餂 centers on obtaining something by hook or trickery, like baiting a trap. The meaning is narrow and specific to luring or snaring.
餂 combines 飠 (food) with 舌 (tongue), suggesting the idea of luring or hooking with food or bait. The exact historical development is uncertain, but the component relationship is clear.
The food radical 飠 beside a tongue 舌: imagine bait on a hook dangling in front of a hungry tongue, luring it in to obtain by hook.
For テン, picture a ten-foot fishing line with a baited hook: ten -> テン, and the bait obtains fish by hook.