 A sure versus ensure versus insure. These three terms are often confused because not only do they sound quite similar, but they also all make an outcome sure. They are by no means interchangeable. So let's break it down. I assure you that he is a great lawyer. We use a sure in this sentence to speak out a promise or say something with confidence. Please ensure that you will be home at five today. In this case, we use ensure to make something certain. I ensure my camera because it was expensive. In this last example, we use ensure because we protect something against risk by obtaining insurance for an object. I am sure you are a pro at using the right word in the right situation now. That's it for today. See you next time. I ensure my camera.