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speed

/spiːd/

他動詞自動詞[C/U] 両方
過去形: sped過去分詞: sped現在分詞: speeding

The word evokes a sense of rapid motion or the acceleration of a process. In its noun form, it is often neutral and technical, focusing on measurement and capability. As a verb, "speed" carries two distinct energies: one of efficiency (causing something to happen faster) and one of urgency or recklessness (moving too fast). When used intransitively regarding travel, it often implies a certain thrill or danger, frequently associated with breaking laws or pushing limits. This contrasts with the transitive use, which is more common in professional or scientific contexts like "speeding up production" or "speeding recovery."

Uncountable when discussing the general physical concept of velocity ('Speed is distance divided by time'). Countable when referring to a specific measurement or record on a speedometer ('The car hit several high speeds during the test').

意味

名詞

The rate at which someone or something is able to move or operate.

"The car reached a top speed of 200 miles per hour."

他動詞

To cause something to happen or develop more quickly.

"The new catalyst will speed the chemical reaction."

自動詞

To move or travel at a high rate of velocity.

"The motorcyclist continued to speed down the highway."

関連語

Last Updated: May 31, 2026Report an Error