The word "ultra precise" refers to something that is extremely accurate and exact. Its antonyms would be words that describe the opposite, such as imprecise, inaccurate, approximate, uncertain, loose, or rough. These words are used to describe things that are not exact, lack precision, or have a degree of error. An example of using one of these antonyms is "The measurements were rough and not ultra precise." One should exercise caution when using these terms, as they can sometimes be subjective and context-dependent. Nevertheless, understanding antonyms can bring clarity and depth to language, allowing for more accurate communication.