The phrase "most on-the-fence" means uncertain or indecisive. Some antonyms for this phrase could be assertive, decisive, confident, convinced, determined or resolute. These words indicate a sense of certainty and a willingness to make a firm decision. Opposite to being "on-the-fence," being assertive means you are willing to take a clear and definitive stance on an issue. It's crucial to have clear and concise communication in many aspects of life, whether it is at work, with family or friends. Using antonyms of "most on-the-fence" can help convey confidence, assurance and trust.