fast
gb/fˈæst/ us/fˈæst/
A1
Anglais
~ 1800
Sens
0 sens
adjective
A1
property
1
Moving quickly
Moving very quickly.
Schéma d’usage :
[something] is fast
Erreur fréquente :
Learners sometimes confuse 'fast' and 'quickly'; 'fast' is often used after 'be' verbs, while 'quickly' is an adverb modifying actions.
Synonymes
quick (Slightly more general; can refer to actions or processes, not just movement speed.)
Antonymes
slow (Describes low speed or lack of quickness.)
Collocations
fast car
|fast train
|fast runner
|fast pace
Thèmes
daily life
|transport
|sports
|core_vocabulary
|travel
|transportation
Exemples
- The cheetah is the fastest land animal.
- She drives a very fast car.
- This computer is fast compared to my old one.
Exemples pédagogiques
- The bus is fast.
- He runs fast.
- This phone is fast.
adverb
A1
property
2
At a high speed
Quickly or with high speed.
Schéma d’usage :
[someone] runs fast
Erreur fréquente :
Learners may incorrectly say 'fastly'; the correct form is 'fast'.
Synonymes
quickly (More general in use; 'fast' is less formal and often used in speech.)
Antonymes
slowly (Describes doing something at a low speed.)
Collocations
run fast
|drive fast
|move fast
Thèmes
daily life
|sports
|core_vocabulary
Exemples
- He runs surprisingly fast for his age.
- The train was moving too fast to stop in time.
- She talks fast when she’s nervous.
Exemples pédagogiques
- He runs fast.
- The car moves fast.
- She speaks fast.
adjective
B1
property
3
Firmly fixed, secure
Held tightly and not able to move.
Schéma d’usage :
[something] is fast [somewhere]
Synonymes
secure (Emphasizes safety or protection rather than immovability.)
Antonymes
loose (Not firmly fixed or attached.)
Collocations
hold fast
|stuck fast
|fast asleep
Thèmes
construction
|daily life
|core_vocabulary
Exemples
- The boat was held fast by the rope.
- The lid was stuck fast and wouldn’t open.
- He held her arm fast.
Exemples pédagogiques
- The rope holds the boat fast.
- The lid is stuck fast.
- He holds my hand fast.
Verbe
B1
action
4
Go without food for a time
To not eat for some time, often for religion or health.
Schéma d’usage :
to fast for [time period]
Synonymes
abstain from eating (More formal and explicit description of the action.)
Antonymes
feast (To eat a lot, often in celebration.)
Collocations
fast during Ramadan
|fast for 24 hours
Thèmes
religion
|health
|food_drink
Exemples
- Muslims fast from dawn to sunset during Ramadan.
- Some people fast once a week for health benefits.
- He decided to fast for two days before the operation.
Exemples pédagogiques
- I fast during Ramadan.
- She will fast for one day.
- They fast for health.
Nom
B1
event
5
A period of not eating food
A time when you do not eat food for religion or health.
Synonymes
abstinence from food (Formal phrase, used in medical or religious contexts.)
Antonymes
feast (An event with abundant eating.)
Collocations
religious fast
|go on a fast
Thèmes
religion
|health
|food_drink
Exemples
- They went on a three-day fast before the ceremony.
- The doctor recommended a short fast before the test.
- Breaking the fast is an important tradition.
Exemples pédagogiques
- He went on a fast.
- The fast lasts two days.
- We break the fast at night.
Grammaire
Forme canonique
fast
API
GB/fˈæst/
US/fˈæst/
Syllabes et accentuation
fast (1 syllabe)
Stress on 1st syllable (fast)
Formes du mot
Adjective
- Base: fast
- Comparative: faster
- Superlative: fastest
Noun
- Base: fast
- Plural: fast, fasts
Verb
- Base: fast
- 3rd Person Singular: fasts
- Present Participle: fasting
- Past: fasted
Famille de mots
Expressions
hold fast
1/hˈoʊld fˈæst/
fixed phrase
Keep a firm grip on something
To keep holding something tightly and not let go.
Exemples
- Hold fast to the railing when climbing the stairs.
- He held fast to his beliefs despite criticism.
play fast and loose
1/plˈeɪ fˈæst ˈænd lˈus/
idiom
informal
Act carelessly or dishonestly
To behave without care or honesty, especially with rules or promises.
Exemples
- The company played fast and loose with safety regulations.
- You can't play fast and loose with people's trust.
fast asleep
1/fˈæst əslˈip/
fixed phrase
sleeping very deeply
Sleeping very deeply and peacefully.
Exemples
- By 10 p.m., the children were fast asleep.
- She looked so peaceful, fast asleep under the blanket.
fast asleep
2/fˈæst əslˈip/
fixed phrase
In deep sleep
Sleeping very deeply.
Exemples
- She was already fast asleep when I came home.
- The baby is fast asleep in his crib.