The phrase "hast a fitting" means to have the appropriate or suitable thing or item. When looking for antonyms for this phrase, the terms that come to mind are unsuitable, improper, inappropriate, unfitting, and inadequate. These words all portray the opposite meaning of the original phrase, suggesting the lack of suitability, appropriateness, and adequacy. Using these antonyms may be beneficial in situations where a negative or adverse outcome is being discussed, and the original phrase would not be appropriate to use. For example, "Unfortunately, we do not have an adequate fitting for this job.