Definition of "Rude" :

adjective: socially incorrect in behavior

adjective: lacking civility or good manners

adjective: belonging to an early stage of technical development; characterized by simplicity and (often) crudeness

"The crude weapons and rude agricultural implements of early man."

adjective: (of persons) lacking in refinement or grace

adjective: (used especially of commodities) being unprocessed or manufactured using only simple or minimal processes

"Bales of rude cotton."