Most inappurtenant means something that is irrelevant or not related to the topic or situation at hand. To find antonyms for this word, we need to look for words that mean something relevant, significant, or appropriate. Some antonyms for most inappurtenant are relevant, pertinent, appropriate, fitting, suitable, relevant, significant, material, and germane. Each of these words highlights the importance of something being relevant or appropriate to the matter being discussed. Using relevant and pertinent information can help clarify a situation or topic and make it easier to understand. In contrast, using most inappurtenant information can cause confusion and distract from the main point.