ignorant

When used to mean 'unaware,' the word is usually followed by the preposition "of" (e.g., ignorant of the facts). This usage is generally neutral and simply describes a lack of information. However, when describing a person as 'ignorant' without specifying what they are unaware of, it often sounds insulting. In this context, it implies that the person is uneducated or willfully blind to the truth. In some regional dialects, particularly in parts of the US and UK, 'ignorant' can be used to describe someone who is being rude or ill-mannered, rather than someone who lacks knowledge.