In a raw or unrefined manner. The sculpture was crudely carved from a single block of wood.
In a way that lacks sophistication or subtlety. The comedian crudely imitated the politician, drawing laughter from the audience.
In a blunt or offensive manner. He crudely interrupted the meeting with his inappropriate comments.
In a rough or approximate way; without attention to exact details. Crudely speaking, the project will cost around a million dollars.