pot
鬷 centers on a pot or vessel, specifically a type of ancient cooking pot. The meaning is concrete and tied to the object itself.
鬷 combines 鬲 (an ancient cauldron or cooking vessel) with 㚇, which likely contributes a phonetic element. The character refers to a type of pot.
The left side 鬲 is a cauldron, and the right side 㚇 looks like a lid with steam rising. Picture a covered pot used for cooking.
For ソウ, imagine a pot so hot it sows steam into the air: sow -> ソウ, and the pot bubbles away.