Antonyms for the phrase "give it a go" include "abstain," "refrain," "resist," "decline," "avoid," and "withdraw." These words and phrases express a lack of willingness to participate or take a risk, rather than the determination and courage implied by "give it a go." Other antonyms might include "surrender," "relinquish," or "give up," indicating a complete abandonment of effort or aspiration. By contrast, "give it a go" suggests an attitude of openness, curiosity, and willingness to confront challenges and obstacles head-on. It is a phrase that encourages action, experimentation, and learning from experience.