The word "re-iterative" implies the repeated process of stating or doing something. Antonyms for this word would indicate singularity or finality, such as "definitive," "conclusive," or "terminal." These words suggest a decisive action or outcome, one that cannot be repeated or undone. Other antonyms may include "nonrepetitive," "singular," or "unsurpassed." These words indicate a one-time occurrence or an action that cannot be repeated in the same way. While "re-iterative" may suggest monotony or redundancy, its antonyms offer a sense of finality, uniqueness, or definitive action.