large
奝 centers on largeness or greatness. It is a rare kanji whose core idea is simply 'large'.
奝 is a rare character combining 大 (big) with 周 (circumference, everywhere), likely suggesting something large or expansive. The exact historical development is uncertain.
Big 大 on top of 周, which suggests all around. Imagine something so large it fills the whole surrounding area.
For チョウ, picture a giant named Chou who is so large he towers over everything: Chou -> チョウ, and his size is the meaning of 奝.