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