corner
陬 centers on a corner, especially a remote or secluded corner of a place.
陬 combines ⻖ (hill, mound) with 取, which likely contributes the sound. The hill radical suggests a corner or nook in the landscape.
The hill radical ⻖ on the left and 取 on the right suggest taking a corner of a hill: a secluded nook.
For スウ, imagine a secluded corner where you can sue for peace: sue -> スウ, and the corner provides a quiet place to settle.