Speed

Definition

Speed refers to the rate at which something moves or operates. It can describe physical motion, the performance of a process, or the rapidity of action.

Parts of Speech

• Noun
• Verb

Pronunciation

American English

• IPA Pronunciation: /spiːd/
• Respelling: SPEED

British English

• IPA Pronunciation: /spiːd/
• Respelling: SPEED

Etymology

The word "speed" originates from the Old English "spēd," meaning "prosperity, success," derived from "spōwan," meaning "to succeed or thrive." The term evolved to denote rapid movement or action by the Middle Ages.

Derivatives

• Speedy (adjective)
• Speedometer (noun)
• Speedster (noun)
• Speediness (noun)
• Speeding (noun/verb)

Synonyms

• Velocity
• Rapidity
• Swiftness

Antonyms

• Slowness
• Lethargy
• Delay

Usage

The term "speed" is widely used in contexts related to motion, efficiency, or quickness. For instance, "The car reached a high speed" or "He worked with impressive speed to complete the task." As a verb, it describes the action of moving or working quickly, e.g., "She sped through the task."

Related Terms

• Acceleration: The increase in speed or velocity.
• Momentum: The force or energy associated with motion.
• Pace: The rate of movement or progress.

Detailed Definitions

Noun

• The rate of motion or operation: Describes how quickly something moves or functions.
  • Example: "The train travels at a speed of 200 miles per hour."
• The capacity for rapid action: Refers to the ability to act or perform tasks quickly.
  • Example: "Her typing speed is impressive."

Verb

• To move quickly: Indicates rapid motion or progress.
  • Example: "The car sped down the highway."
• To accelerate or cause to move faster: Describes increasing the pace of movement or action.
  • Example: "She sped up her efforts to meet the deadline."