Definition: Moving or happening very quickly.

Example: The rapid growth of technology has changed our lives significantly.

Definition: A fast-moving section of a river where the water flows quickly, often with obstacles that create rough surfaces.

Example: The kayakers navigated through the rapids with skill and excitement.

Definition: A decrease in density and pressure in a medium, often related to sound waves, where the particles are spread apart.

Example: The rarefaction of air allows sound waves to travel more easily in certain conditions.

Definition: Belonging to a small, select group or having a high level of quality or style; often used to describe something that is not common or is more refined.

Example: The rarefied atmosphere of the exclusive club made it difficult for newcomers to fit in.

Definition: To become less dense or more thin, often referring to air or other substances.

Example: As the altitude increases, the air begins to rarefy, making it harder to breathe.

Definition: To make something thinner or less dense, often by removing some of its substance or impurities.

Example: The scientist aimed to rarefy the gas in the chamber to study its properties.

Definition: Describing something that is less dense or has a lower concentration, often used in a figurative sense to refer to ideas or environments that are exclusive or elevated in nature.

Example: The rarified atmosphere of the elite club made it difficult for newcomers to feel comfortable.

Definition: To make something less dense or more rare; to thin out or reduce in density.

Example: The scientist aimed to rarify the gas in the chamber to study its properties.

Definition: A substance that is used to kill rats.

Example: The farmer used raticide to control the rat population in his barn.

Definition: A way to compare two quantities by showing how much of one there is compared to the other, often written as a fraction or with a colon.

Example: The ratio of students to teachers in the school is 20 to 1.

Definition: To think carefully and logically about something in order to understand it or make a decision.

Example: She likes to ratiocinate before making important choices.

Definition: The process of thinking carefully and logically to form conclusions or judgments.

Example: Her ratiocination led her to solve the complex problem efficiently.