Wordnet 3.0
ADJECTIVE (1)
1. 
 unaware because of a lack of relevant information or knowledge; 
- Example: "he was completely ignorant of the circumstances"- Example: "an unknowledgeable assistant"- Example: "his rudeness was unwitting"[syn: ignorant, unknowledgeable, unknowing, unwitting]
WordNet (r) 3.0 (2006):
unknowledgeable
    adj 1: unaware because of a lack of relevant information or
           knowledge; "he was completely ignorant of the
           circumstances"; "an unknowledgeable assistant"; "his
           rudeness was unwitting" [syn: ignorant,
           unknowledgeable, unknowing, unwitting]