till, cultivate, hunting
畋 centers on working the land and pursuing game: tilling fields and hunting. The two meanings connect through the idea of actively engaging with the open countryside.
畋 combines 田 (field) with 攵 (a hand holding a tool or weapon), suggesting working the land or hunting in the fields. The exact historical development is uncertain.
A field 田 and a hand with a tool 攵: picture a farmer tilling the soil, then using the same tool to hunt game in the countryside.
For デン, imagine a den in the field where a hunter rests after tilling and hunting: den -> デン.