The word "unpositive" can have various antonyms, depending on the context in which it is being used. If "unpositive" refers to a negative mindset or attitude, then some antonyms may include "positive," "optimistic," "hopeful," "confident," or "upbeat." If "unpositive" refers to the absence of something, antonyms could include "affirmative," "confirmative," "positive," or "favorable." Alternatively, if "unpositive" refers to a lack of progress or improvement, antonyms may be "productive," "fruitful," "successful," "improving," or "progressive." It is essential to determine the context before selecting the appropriate antonym for "unpositive.