Antonyms for the phrase 'hast a go at' include restraint, refrain, withhold, hesitate and avoid. When one refrains from 'having a go at' something, they show a level of caution and choose not to partake in an action that could result in regret or failure. Withholding refers to the act of holding back from taking part in something or expressing an opinion, while hesitation means a delay in taking action or making a decision. Avoiding something entirely means completely steering clear of it. Antonyms for 'hast a go at' imply tempered action, caution, and a conscious effort to avoid risks.