The term "gave idea of" can be replaced with several antonyms depending on the context in which it is being used. The most common antonyms are "confused," "obscured," "hid," "mystified," and "fogged." These words describe situations where the idea is not clear or easily comprehensible but rather elusive or incomprehensible. For instance, one might argue that the author's use of complex vocabulary and syntax obscured their point. On the other hand, when an idea is clear and distinct, words like "clarify," "illuminate," "elucidate," and "expound" can be used as antonyms to communicate the idea well. Depending on the context, it's important to choose the appropriate antonym that reflects the intended meaning.