This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
軇 combines 身 (body) with 壽, which likely contributes the sound トウ. The exact historical development and original meaning are uncertain.
The left side 身 suggests something related to the body, and the right side 壽 is associated with longevity. Imagine a body that endures for a long time, but remember the exact meaning is uncertain.
For トウ, picture a tall (たかい) tower (トウ) made of bodies (身) stacked high like a long life (壽). The tower's height cues トウ.