"Nonambiguous" is a word that refers to something that is clear and void of any confusion or doubt. Its antonyms are words that convey the exact opposite meaning. Some of the antonyms for "nonambiguous" are ambiguous, vague, uncertain, unclear, and doubtful. These words denote a lack of clarity, making it difficult to understand the intended meaning. The use of ambiguous language can lead to misinterpretations, misunderstandings, and mistakes, which can be problematic in various settings. Therefore, it is essential to use precise language that eliminates any ambiguity or confusion, thus making the communication more effective and accurate.