fast
Something that moves with high speed or happens quickly.
Explanation at your level:
Fast means moving quickly. Think of a rabbit or a car. If something is fast, it does not take a long time. You can say: 'The train is very fast.' Use it when you talk about speed.
At this level, you can use fast to describe things that move or happen in a short time. Common phrases include fast food or a fast runner. Remember, it is the same word for adjectives and adverbs.
Fast is used to describe high velocity or brief duration. You might use it in business contexts, like a fast-growing company. It is a very common word that helps you sound more natural when describing processes or physical movement.
At the B2 level, notice how fast functions in idiomatic expressions. Phrases like fast and loose or fast track add nuance to your speech. You should also distinguish between physical speed and metaphorical speed, such as a fast learner.
In advanced English, fast can carry connotations of intensity. Consider the phrase fast friends, which implies a strong, firm bond. Understanding the etymological link to 'firmness' helps you grasp why we use it in contexts that don't involve movement at all, like being fast asleep.
Mastering fast involves recognizing its historical evolution from 'fixed' to 'rapid.' In literary contexts, it can be used to describe things that are unyielding or secure. Its versatility is a hallmark of native-level fluency, where the distinction between its literal speed-based meaning and its archaic 'firm' meaning creates subtle, poetic layers in writing.
Palabra en 30 segundos
- Fast means high speed.
- It is both adjective and adverb.
- Never add -ly.
- Common in many idioms.
When you use the word fast, you are usually talking about speed. Whether it is a fast car zooming down the highway or a fast runner crossing the finish line, the word implies that distance is covered in a short amount of time.
It is important to remember that fast can also describe the duration of an event. For example, if a meeting is fast, it means it didn't take long. It is a very versatile word that fits into almost any conversation about time or movement.
The word fast has deep roots in Old English, specifically the word fæst. Back then, it didn't just mean quick; it meant firm or fixed. Think of a 'fast' color that doesn't fade or being 'fast asleep'—meaning you are firmly stuck in sleep.
Over centuries, the meaning shifted from 'firmly held' to 'moving with intensity.' It is fascinating how the idea of being 'firm' evolved into the idea of 'moving quickly' because something moving with great intensity is hard to stop or hold back. It shares roots with German fest, which still keeps that original meaning of 'firm' or 'solid' today.
You will hear fast used in many daily situations. We often pair it with nouns like fast food, fast lane, or fast track. It is a neutral word, meaning you can use it in a casual chat with friends or in a professional meeting at work.
Be careful not to confuse it with 'quick.' While they are synonyms, fast is usually used for physical movement, while 'quick' often describes a reaction or a short amount of time. However, in modern English, they are frequently interchangeable.
Idioms make language colorful! Fast and loose means acting without responsibility. Fast asleep means sleeping deeply. Play fast and loose is another version often used in business contexts.
You might also hear fast-talking, which describes someone who is persuasive but maybe a bit dishonest. Finally, in the fast lane refers to a lifestyle that is exciting and busy. These expressions show how fast is embedded in our culture.
The word fast is unique because it acts as both an adjective and an adverb without changing its form. You say 'a fast car' (adjective) and 'he drives fast' (adverb). You never add '-ly' to make it an adverb!
In terms of pronunciation, the British IPA is /fɑːst/ while the American IPA is /fæst/. It rhymes with past, last, cast, mast, and vast. It is a single-syllable word that usually carries the primary stress in any phrase it occupies.
Fun Fact
The word 'fast' meaning 'to not eat' comes from the idea of 'holding fast' to a religious rule.
Pronunciation Guide
Long 'a' sound.
Short 'a' sound.
Common Errors
- Adding -ly
- Mispronouncing the 'a'
- Confusing with 'first'
Rhymes With
Difficulty Rating
easy
easy
easy
easy
What to Learn Next
Prerequisites
Learn Next
Avanzado
Grammar to Know
Adverbs of manner
He runs fast.
Comparative adjectives
Faster than.
Superlative adjectives
The fastest.
Examples by Level
The cheetah is fast.
Cheetah = big cat
Adjective
He runs fast.
He = boy
Adverb
The car is fast.
Car = vehicle
Adjective
They are fast.
They = people
Adjective
Is it fast?
Question
Question
It is not fast.
Negative
Negative
A fast bike.
Bike = bicycle
Adjective
Go fast!
Command
Adverb
The internet is very fast.
I like fast food.
She is a fast reader.
The fast train arrives at noon.
Don't drive so fast.
He wants a fast answer.
They need a fast solution.
The fast pace of the city.
The company is on a fast track to success.
He is a fast learner.
The meeting was fast and productive.
She has a fast metabolism.
They became fast friends.
We need to make a fast decision.
The fast lane is for passing.
Life moves at a fast pace.
He played fast and loose with the rules.
She was fast asleep when I arrived.
The economy is in a fast decline.
They are fast becoming the market leaders.
He is a fast talker when nervous.
The fast-moving storm caused damage.
We need a fast-acting remedy.
She has a fastidious, fast-paced routine.
The color is fast and won't wash out.
He held fast to his beliefs despite pressure.
The fast-paced nature of the industry is exhausting.
They were fast friends for over a decade.
The fast-forward button is broken.
His fast-talking style hides his lack of knowledge.
The fast-spreading news shocked everyone.
She is a fastidious worker with a fast rhythm.
The anchor held fast against the current.
He remained fast in his resolve.
The fast-fading light signaled the end of the day.
She was fast bound by her promise.
The fast-flowing river carved the valley.
He is a fast-witted debater.
The fast-changing political climate.
They are fast allies in this struggle.
Colocaciones comunes
Idioms & Expressions
"fast and loose"
irresponsible
Don't play fast and loose with the budget.
casual"fast asleep"
deeply sleeping
He was fast asleep by 9 PM.
neutral"fast friends"
close friends
We became fast friends at camp.
neutral"fast track"
accelerated path
She is on the fast track to success.
neutral"fast talker"
persuasive/deceptive person
He is a fast talker, watch out.
casual"hold fast"
keep a firm grip
Hold fast to your values.
formalEasily Confused
similar meaning
quick is reaction, fast is motion
He is quick to react; he runs fast.
similar meaning
rapid is formal/process
Rapid growth.
similar meaning
swift is elegant
A swift bird.
similar meaning
speedy is delivery/casual
Speedy delivery.
Sentence Patterns
Subject + is + fast
The train is fast.
Subject + runs + fast
He runs fast.
It is a + fast + noun
It is a fast car.
Subject + is + fast + asleep
She is fast asleep.
Subject + is + fast + becoming
He is fast becoming a star.
Familia de palabras
Nouns
Verbs
Adjectives
Relacionado
How to Use It
10
Formality Scale
Errores comunes
Fast is already an adverb.
Use -er for short words.
Use -est for short words.
Need both 'as' for comparison.
Fastingly is not a word.
Tips
No -ly
Never add -ly to fast.
Adjective/Adverb
It works for both.
Fast Food
Refers to burgers/fries.
Rhyme
Rhymes with past.
Fastly
Avoid this error.
Fasting
Religious meaning.
Flashcards
Use it in sentences.
Mnemonic
Flying Across Streets.
Fast Asleep
Deep sleep.
Fast Lane
Busy life.
Memorize It
Mnemonic
F-A-S-T: Flying Across Streets Today.
Visual Association
A cheetah running.
Word Web
Desafío
Use 'fast' in 3 sentences today.
Origen de la palabra
Old English
Original meaning: Firm, fixed, secure
Contexto cultural
None
Used daily in sports, business, and food.
Practice in Real Life
Real-World Contexts
travel
- fast train
- fast route
- fast travel
work
- fast pace
- fast learner
- fast track
food
- fast food
- fast service
- fast delivery
sleep
- fast asleep
- falling fast asleep
Conversation Starters
"Do you like fast cars?"
"Are you a fast learner?"
"What is your favorite fast food?"
"Do you walk fast?"
"Is your life fast-paced?"
Journal Prompts
Describe a time you had to move fast.
Why do people like fast food?
Is it better to be fast or slow?
What does 'fast asleep' mean to you?
Preguntas frecuentes
8 preguntasNo, never use fastly.
Yes, a fast meeting.
Both.
Faster.
Fastest.
Quickly prepared food.
No, it means not eating.
Old English origins.
Ponte a prueba
The car is ___.
Fast is the correct adjective.
Which is an adverb?
Fast is both.
Fastly is a correct word.
It is not a word.
Word
Significado
Collocations match.
Subject-verb-adverb.
Puntuación: /5
Summary
Fast is a versatile word for speed that never changes its form when used as an adverb.
- Fast means high speed.
- It is both adjective and adverb.
- Never add -ly.
- Common in many idioms.
No -ly
Never add -ly to fast.
Adjective/Adverb
It works for both.
Fast Food
Refers to burgers/fries.
Rhyme
Rhymes with past.
Ejemplo
This is very fast.
Related Content
Aprende en contexto
Esta palabra en otros idiomas
Frases relacionadas
Más palabras de Descriptions
short
A1Describes something that measures a small distance from one end to the other or is not tall in height. It is also used to describe a brief period of time or a limited amount of something.
rapid
A1Aquí parece haber un error. 'Rapid' es un adjetivo para rápido. ¿Quizás querías decir 'rapid'?
low
A1Not high or tall in height, often positioned close to the ground or a base level. It can also describe a small amount of something, a quiet sound, or a sad mood.
narrow
A1Narrow describes something that has a very small distance from one side to the other. It is the opposite of wide and is often used to describe roads, paths, or spaces.
thick
A1Describes something that has a large distance between its two opposite sides or surfaces. It can also describe liquids that are dense and do not flow easily, or things that grow closely together like hair or forest trees.
full
A1The complete amount or the state of being total without any parts missing. It is most frequently used in fixed phrases like 'in full' to describe a payment or a name that is complete.
gray
A1A neutral color that is a mixture of black and white, often seen in clouds, ash, or lead. It is used to describe objects that lack bright color or to represent a sense of seriousness and neutrality.
purple
A1Purple is a color that is made by mixing red and blue together. It is a common color found in nature, such as in certain flowers and fruits like grapes.
tiny
A1Describes something that is very small in size, amount, or degree. It is more emphatic than the word 'small' and is often used to highlight how little something is.
perfect
A1En gramática, se refiere a tiempos verbales de acciones terminadas. También se usa en la frase 'la práctica hace al maestro' para hablar de un estado sin errores.