ignorant

Adjective

• unaware because of a lack of relevant information or knowledge
  • he was completely ignorant of the circumstances
    
  • an unknowledgeable assistant
    
  • his rudeness was unwitting
    

• uneducated in the fundamentals of a given art or branch of learning; lacking knowledge of a specific field
  • she is ignorant of quantum mechanics
    
  • he is musically illiterate
    

• uneducated in general; lacking knowledge or sophistication
  • an ignorant man
    
  • nescient of contemporary literature
    
  • an unlearned group incapable of understanding complex issues
    
  • exhibiting contempt for his unlettered companions
    

Related words

• Synonyms: 
  unknowledgeable , unknowing , unwitting , illiterate , nescient , unlearned , unlettered