This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
逨 combines the movement radical 辶 with 來, which likely contributes the sound. The exact historical development is uncertain.
The movement radical 辶 surrounds 來, suggesting something coming or arriving, but the exact meaning is unclear.
For ライ, imagine a line of people coming along a path: line -> ライ, and the movement radical shows them arriving.