The antonym for "understand" is "misunderstand." When you misunderstand something or someone, you fail to comprehend or grasp the meaning or intention behind it. Another antonym for "understand" is "confuse." When something is confusing, it perplexes you and makes it harder to comprehend or understand the situation. Additionally, "ignorance" is another antonym for "understand." When you are in a state of ignorance, you don't have the knowledge or understanding of something or someone. Lastly, the antonym "misinterpret" is about getting the wrong idea or meaning from something that was said or done. This can result in a failure to understand the intent or message conveyed.