This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
俀 combines 亻 (person) with 妥, but the exact historical development and original meaning are uncertain. It may have been a variant or a character with a now-obscure usage.
A person 亻 beside 妥, a shape associated with peace or settling. Without a clear meaning, picture a person settling into an uncertain role.
For タイ, imagine a person tying a knot: tie -> タイ, and the person 亻 is tying the peace 妥 together.