rapid

Imagine a hummingbird beating its wings or prices rising in a flash. That is what rapid describes: something happening very fast, often over a short time. A rapid heartbeat can show excitement or exercise, and a rapid increase in ticket prices can happen as soon as tickets go on sale. "Fast" and "quick" are close in meaning, but "rapid" is often used for change, growth, movement, or a series of actions that happen very quickly. Think of a fast-flowing river or a stream of questions in a heated debate.

The word rapid describes something that happens very fast. It is close in meaning to "fast" or "quick," but it is often used when the speed is striking, sudden, or easy to notice. A "rapid response team," for example, is expected to act without delay when an emergency happens.

You can use "rapid" for physical movement, such as a cheetah's rapid acceleration, but it is also common with changes, growth, and progress. We often hear about a "rapid increase" in the popularity of new technology or "rapid advances" in medicine. In these cases, the idea is that things are changing so quickly that people may struggle to keep up.

Historically, "rapid" comes from the Latin word rapidus, meaning swift or forceful, often linked to rushing water. That is why we still use the noun "rapids" for the rough, fast-moving parts of a river. Whether you are describing a sprinter, a sudden rise in data, or quick change over time, rapid points to speed that feels clear, strong, and hard to miss.