general
摠 centers on the idea of bringing things together into a whole: the general, overall, or comprehensive aspect of something. It suggests gathering or summarizing under one hand.
摠 is a variant form of 總, combining 扌 (hand) with 悤, which likely contributes the sound and the idea of gathering or bundling. The exact historical development is uncertain, but it is related to the concept of summarizing or controlling with the hand.
The hand 扌 beside 悤 suggests a hand pulling together scattered things into one general whole. Imagine gathering loose threads into a single bundle.
For ソウ, picture a hand sewing together a general summary: sew -> ソウ, as you stitch all the parts into one.