beautiful, handsome, woman, fast, speedy
倢 centers on two distinct ideas: physical attractiveness (beautiful, handsome, woman) and quickness (fast, speedy). These meanings do not share one clear conceptual center, so treat them as separate clusters.
倢 combines 亻 (person) with 疌, which likely contributes the sound. The exact historical development of 疌 and its role in expressing beauty or speed is uncertain.
A person 亻 beside 疌: imagine a person who is both strikingly beautiful and moves with quick, graceful speed.
For ショウ, picture a beautiful person showing off their speedy moves: show -> ショウ, and the person 亻 beside 疌 dazzles the crowd.