be separated, (ghost kanji)
This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development is uncertain. The modern form visually contains 日 (sun) above 非 (not, wrong), but this is not a reliable guide to its origin.
The sun 日 is separated from the wrong 非 below, like a ghostly presence that cannot connect.
For ヒ, imagine a ghostly he (he -> ヒ) who is separated from the world, floating above the wrongness below.
—