be satisfied, be comfortable
愜 centers on a state of contented ease: feeling satisfied and comfortable, with no unmet needs or discomfort.
愜 combines 忄 (heart/mind) with 匧, which likely contributes the sound and may relate to a container or enclosure, suggesting a heart at ease within its bounds.
The heart radical 忄 beside 匧, which looks like a person 大 inside a box 匚, suggests a heart comfortably enclosed and at rest.
For キョウ, imagine a satisfied person in Kyoto (京都, きょうと) feeling completely at ease: Kyoto -> キョウ, and the heart is comfortable.