This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 彵 is uncertain. It combines 彳 (step/go) with 也, but the original semantic and phonetic roles are unclear.
The left side 彳 suggests movement, and the right side 也 is a shape often associated with a scorpion or a container. Picture a scorpion slowly creeping along a path, moving quietly.
For タ, imagine a tarantula (タ) moving quietly along the path: the tarantula's slow, silent steps match the quiet movement idea.