The adj rude has 5 senses (first 2 from tagged texts)
1. (2) ill-mannered, bad-mannered, rude, unmannered, unmannerly -- (socially incorrect in behavior; "resentment flared at such an unmannered intrusion")
2. (1) ill-bred, bounderish, lowbred, rude, underbred, yokelish -- ((of persons) lacking in refinement or grace)
3. uncivil, rude -- (lacking civility or good manners; "want nothing from you but to get away from your uncivil tongue"- Willa Cather)
4. natural, raw, rude -- ((used especially of commodities) being unprocessed or manufactured using only simple or minimal processes; "natural yogurt"; "natural produce"; "raw wool"; "raw sugar"; "bales of rude cotton")
5. crude, primitive, rude -- (belonging to an early stage of technical development; characterized by simplicity and (often) crudeness; "the crude weapons and rude agricultural implements of early man"; "primitive movies of the 1890s"; "primitive living conditions in the Appalachian mountains")