Antonyms for the phrase "hath a crack" could include terms like "intact," "flawless," or "unblemished." Each of these alternative descriptors implies a state of wholeness or completeness, which stands in stark contrast to the idea of having a crack or breakage. Other antonyms could include phrases like "fully functioning," "undamaged," or "pristine." Depending on the context in which the phrase is used, different antonyms may be more or less appropriate. However, in general, any term that suggests a lack of cracks or damage could be considered an antonym for "hath a crack.