hew to (something)
To adhere to a particular idea or rule. The teacher will deduct points if you don't hew to the guidelines for the project.
hew to something
to conform to a rule or principle. I wish you would hew to the rules a little better. Sarah refuses to hew to the company policies.
To conform to some law, set of beliefs, or course of action: I hope our children will hew to the traditions of our ancestors.