The phrase "be put off by" means to feel a sense of aversion towards someone or something, which can cause hesitation or reluctance. Luckily, there are many synonyms that one can use to express the same sentiment in a more impactful way. Some alternatives to "be put off by" include words like repelled, deterred, discouraged, or dissuaded. Other synonyms that might be useful in this context include turned off, averted, alienated, or repulsed. Regardless of which term you choose, using stronger language will help you convey your feelings more effectively. So if you find yourself feeling hesitant towards someone or something, consider using one of these powerful synonyms to better articulate your thoughts and emotions.