It's often best to use examples! "unique" is something where there is nothing like it that exists elsewhere. For example, fingerprints are unique because they are all different! No two fingerprints are the same. More examples: - Her painting was very unique. I had never seen anything like it before. - You need to come up with a unique password for this website! - John has a very unique face. I can't think of anyone that he resembles. "fragile" describes something that can break very easily, so we have to be careful with. Glass cups and ceramic dishes are examples of things that are fragile. More examples: - The dish was so fragile that Sarah managed to break it just by placing it on the table. You can also say "fragile" of people, meaning that they feel emotionally close to a breaking-point. They may be very upset or depressed, or perhaps angry. We can also say they are fragile if someone is feeling very ill. When someone is fragile, like when an object is fragile, we have to be careful not to make things worse for them. - John was feeling very fragile after his pet fish passed away, so Sarah didn't risk speaking to him. - Peter has a bad cold so he's feeling a little fragile.