lost, hide, peace, mistake, beautiful, in turn
佚 has a scattered set of meanings that do not share one clear center. The main cluster involves loss, escape, or hiding, with secondary senses of peace, beauty, and sequence that are harder to connect.
佚 combines 亻 (person) with 失 (lose), suggesting a person who is lost or escapes. The historical development is uncertain, and the modern form may be a simplification.
A person 亻 who is lost 失: imagine someone wandering off and disappearing, hiding away from the world.
For イツ, picture a person who is lost and needs to eat: eat -> イツ, and the lost person finally finds food.
being comfortable; relaxing