The phrase "have a go" refers to trying something out. The opposite of having a go would be giving up or not trying at all. Other antonyms for "hast a go" include surrendering, quitting, abstaining, avoiding, neglecting, and deferring. These antonyms all refer to different levels of avoidance or lack of participation. It's important to remember that not having a go can sometimes be a form of self-preservation or protection in certain situations. However, persisting through challenges and having the courage to try can often lead to growth, new experiences, and personal success.