rude in WordNet English dictionary

1. socially incorrect in behavior
   "resentment flared at such an unmannered intrusion"
   ill-mannered  bad-mannered  rude  unmannered  unmannerly 
   
2. (of persons) lacking in refinement or grace
   ill-bred  bounderish  lowbred  rude  underbred  yokelish 
   
3. 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"
   crude  primitive  rude 
   
4. (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"
   natural  raw  rude 
   
5. lacking civility or good manners
   "want nothing from you but to get away from your uncivil tongue"- Willa Cather
   uncivil  rude