Deep six is a slang term that means "to discard or get rid of something." Some antonyms for deep six may include preserving, keeping, holding, saving, rescuing, salvaging, retaining and nurturing. These words suggest actions that aim to protect something or someone, rather than disposing of them. While deep six implies a sense of finality and irreversible action, its antonyms highlight the importance of preserving and saving things that are valuable. In a world where waste is becoming a critical issue, recognizing the value of things and preserving them is becoming more critical than ever.