This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
俋 combines the person radical 亻 with 邑, but the exact historical development is uncertain.
A person 亻 beside 邑, a component associated with a city or settlement. The meaning is unclear, but it may relate to a person in a community.
For チュ, imagine a person 亻 in a city 邑 chewing on a piece of straw while working the fields: chew -> チュ, and the person is tilling (たがや.す).