The word "de-finiteness" refers to the quality of being clear and well-defined. Some antonyms or opposite words of "de-finiteness" could be ambiguity, vagueness, uncertainty, or haziness. These words suggest a lack of clarity and precision, making them the opposite of de-finiteness. Ambiguity means having more than one possible meaning, while vagueness suggests a lack of clarity or precision. Uncertainty is the opposite of de-finiteness because it implies a lack of confidence or conviction, and haziness means unclear or fuzzy. These antonyms of "de-finiteness" indicate a lack of clarity and well-defined boundaries.