This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
儯 is a rare character composed of 亻 (person) and 駦. The exact historical development and original meaning are uncertain.
A person 亻 beside the complex 駦 shape. Without a clear meaning, picture a person standing next to a galloping horse-like form, perhaps suggesting something long or drawn out.
For トウ, imagine a person 亻 trying to tow a long, heavy object: tow -> トウ, and the effort feels long and drawn out.