an speed

USAGE SUMMARY

The phrase "an speed" is not correct in written English.
It should be "a speed" because "speed" begins with a consonant sound. Example: "The car reached a speed of 120 miles per hour."

⚠ May contain grammatical issues

Science

Wiki

News & Media

Human-verified examples from authoritative sources

Exact Expressions

2 human-written examples

Two crystals were grown at the same time in the same furnace in 〈110〉 orientation at an speed of 5.5 mm/day and 8 mm/day by physical vapor transport in the microgravity condition to reduce gravity driven convection.

Advances in Space Research

They rated her engines at only 4000 PS, but they produced a maximum of 4657 PS and gave an speed just over 15 knots during her machinery trials in June 1868 after the completion of her overhaul.

Wikipedia

Human-verified similar examples from authoritative sources

Similar Expressions

58 human-written examples

A speed bump is installed.

The New York Times

It's a speed bump".

The New York Times

"I'm a speed skater.

The New York Times - Magazine

A speed guy.

The New York Times - Sports

The toilet babbles like a speed freak.

The New Yorker

It has a speed of 80 mph.

The New Yorker

The family trauma is a speed bump.

The New York Times - Arts

Each one is a speed bump.

The New Yorker

The agenda hit a speed bump.

The New York Times - Science

Expert writing Tips

Best practice

Always use the article "a" before the word "speed" when it's used as a general, non-specific noun. For example, "The car was traveling at a speed of 60 mph."

Common error

Avoid using "an" before "speed". "An" is used before words that begin with a vowel sound, while "a" is used before words that start with a consonant sound.

Linguistic Context

The phrase "an speed" functions incorrectly as a noun phrase due to the incorrect use of the article. Ludwig AI indicates that the grammatically correct form is "a speed". This phrase typically describes the rate at which something moves or operates.

Expression frequency: Rare

Frequent in

Science

33%

Wiki

33%

News & Media

33%

Less common in

Formal & Business

0%

Encyclopedias

0%

Reference

0%

Ludwig's WRAP-UP

The phrase "an speed" is grammatically incorrect; the correct form is "a speed". Ludwig AI emphasizes this point, as "an" is used before words that begin with a vowel sound, while "a" is used before consonant sounds. Though examples exist, they do not validate the expression and the use remains incorrect. While the intended purpose is to describe a rate of motion, the error detracts from clarity. For similar ideas, consider using alternatives such as "a rate" or "a velocity", depending on the context. Remember to always use the correct article to ensure grammatical accuracy and clarity in your writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

a speed

Corrects the grammatical error by using the proper article "a" before the consonant sound.

a rate

Replaces "speed" with "rate", offering a semantically similar term but correcting the grammatical issue.

a velocity

Substitutes "speed" with "velocity", providing a more formal and precise synonym.

the speed

Uses the definite article "the" when referring to a specific speed that has already been mentioned or is understood.

certain speed

Modifies "speed" with "certain", indicating a particular but unspecified speed.

average speed

Specifies the type of speed being referred to, indicating the typical speed over a period or distance.

high speed

Indicates that the speed is notably fast.

low speed

Indicates that the speed is notably slow.

constant speed

Describes a speed that does not change over time.

initial speed

Refers to the speed at the beginning of a process or movement.

FAQs

Why is it incorrect to say "an speed"?

The correct article to use before "speed" is "a" because "speed" begins with a consonant sound. "An" is only used before words that begin with a vowel sound.

What article should I use before words like "hour"?

Even though the word "hour" begins with the consonant "h", it has a vowel sound. Thus, you would say "an hour", unlike "a speed".

Can I use a different word instead of "speed" to describe how fast something is moving?

Yes, you can use synonyms like "velocity" or "rate", which have similar meanings and may be more appropriate depending on the context.

Is there any situation where using "the speed" is more appropriate than using "a speed"?

Yes, "the speed" is used to refer to a specific speed that has already been mentioned or is understood in context. For example, "The pilot reduced the speed of the aircraft".