The opposite of unwise are words like wise, knowledgeable, and intelligent. A wise person is someone who has experience and the ability to make sound decisions. A knowledgeable person is someone who has learned a lot about a particular topic or subject. An intelligent person is someone who has a high IQ and can think logically and critically. All of these words describe someone who is smart, thoughtful, and makes good choices. It is important to use antonyms like these when trying to communicate effectively and clearly. By using antonyms, we can communicate more clearly, making our ideas and thoughts more easily understood.