pretty, attractive, graceful
婷 centers on feminine beauty and elegance: a woman who is pretty, attractive, and graceful in appearance or manner.
婷 combines 女 (woman) with 亭, which likely contributes the sound and carries a sense of poised stillness or elegance. The exact historical development is uncertain.
A woman 女 beside a graceful pavilion 亭: picture a poised lady standing by an elegant garden pavilion, embodying beauty and grace.
For テイ, imagine a graceful woman taking tea in the pavilion: tea -> テイ, and her elegance matches the setting.