prevent

To prevent something is to act before it happens so it does not happen at all. Think of building a dam to prevent flooding: you act early to avoid damage later. You can prevent illness by getting vaccinated, or prevent an argument by choosing your words carefully. It is about being careful and stopping trouble before it starts. Sometimes it is as simple as locking the door to prevent burglars from entering.

The word "prevent" means to take action in advance so that something unwanted does not happen. It is more than just stopping something that has already started; it is about seeing a possible problem and acting early to avoid it. Imagine a detective trying to prevent a crime. They do not wait for the robbery to happen. Instead, they gather clues and step in beforehand.

You might say, "The new security measures are designed to prevent theft," or "Regular exercise can help prevent heart disease." The word often suggests planning and care. You prevent something by seeing the risk early and taking steps so it does not come to pass.

"Prevent" is not just for big events. It also appears in everyday situations: "She prevented her son from running into the street," or "A good umbrella will prevent you from getting soaked in the rain." It often pairs with the word "from," as in, "Nothing could prevent him from achieving his dream."

Sometimes, people talk about something being "impossible to prevent" when no action seems able to stop it.

So, whether you are building safeguards against disaster or simply holding someone back from danger, "prevent" describes stopping something before it has the chance to begin. It is a practical word about early action, protection, and avoiding unwanted results.