This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
迮 combines 辶 (movement) with 乍, which likely contributes a phonetic element. The exact historical development is uncertain.
The movement radical 辶 surrounds 乍, suggesting something related to motion or travel, but the exact meaning is unclear.
For サク, imagine a sack tied to a traveler's back as they move along a path: sack -> サク, and the movement radical 辶 reinforces the journey.