"unknowledgeable" in the adjective sense
1. ignorant, unknowledgeable, unknowing, unwitting
unaware because of a lack of relevant information or knowledge
"he was completely ignorant of the circumstances"
"an unknowledgeable assistant"
"his rudeness was unwitting"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License