beautiful
媺 centers on beauty, especially as a quality of a person or thing that is pleasing to the senses.
媺 combines 女 (woman) with a phonetic component that includes 山 and 攵. The exact historical development of the right side is uncertain, but the character likely expressed beauty through the woman radical.
A woman 女 beside a shape that suggests a mountain 山 and a hand with a stick 攵: imagine a woman so beautiful that even the mountain and the hand pause to admire her.
For ビ, picture a beautiful bee landing on the woman's hand: bee -> ビ, and its beauty makes the scene lovely.