When we talk about giving one idea, there are many antonyms that come to mind. One could say that withholding, suppressing or concealing an idea are some of the antonyms for giving one idea. Similarly, depriving, denying, or obstructing the sharing of an idea are also opposite in meaning to giving an idea. Moreover, uncommunicative, tight-lipped or taciturn can all be considered antonyms for the act of delivering an idea to others. In essence, antonyms for giving one idea revolve around the idea of holding back, keeping mum, or refusing to divulge information rather than sharing it.