Un-needed is a term used to describe something that is not required or necessary. Antonyms, on the other hand, are words that have opposite meanings to a particular term. Several antonyms for the word un-needed include essential, indispensable, necessary, needed, required, significant, valuable, and wanted. Each of these words implies that something is crucial or important, unlike un-needed, which suggests the opposite. When used in the right context, antonyms help to create a better understanding of the meaning of a particular word and improve the overall quality and effectiveness of communication.