This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 慿 is uncertain. It visually contains 心 at the bottom, suggesting a connection to emotions or mental states, but the upper component's origin is unclear.
With 心 at the bottom, imagine a heavy feeling pressing down on the heart, but the exact meaning is unclear.
For ヒョウ, picture a hyō (雹, hail) stone striking the heart 心: hyō -> ヒョウ, a sudden heavy feeling.