The antonyms for the phrase "goes all out" are words like restrained, cautious, hesitant, and reluctant. Going all out implies giving it your all, no matter the cost, while restraint suggests doing the opposite, holding back, and not giving it your all. Cautious and hesitant both imply reluctance or fear, suggesting one is not fully invested in the task at hand, while reluctant implies sheer unwillingness or opposition to do something wholeheartedly. In short, the antonyms of "going all out" reflect a lack of wholeheartedness or enthusiasm needed to achieve success, demonstrating once again how language can subtly shift our perceptions of a phrase's underlying meaning.