coarse, rough, rude
觕 centers on a lack of refinement: something coarse, rough, or rude in texture, manner, or quality.
觕 combines 牜 (cow) and 角 (horn), likely suggesting the rough, coarse quality of a cow's horn. The exact historical development is uncertain.
A cow (牜) with a horn (角) looks rough and coarse, not smooth or refined. Picture a rugged horn that embodies rudeness.
For ソ, imagine a coarse, rough piece of cloth that you sew (ソ) together crudely: sew -> ソ, and the rough fabric matches the kanji's meaning.