antagonist
gb/æntˈæɡənɪst/ us/æntˈæɡənɪst/
B2
English
~ 8500
Senses
0 senses
Noun
B2
entity
1
main opponent in a story
The most important character in a story or movie who fights against the hero and creates problems for them.
Usage pattern:
[someone] is the antagonist in [a story/film]
Common mistake:
Learners often confuse ‘antagonist’ with ‘protagonist’. The protagonist is the central character the story mainly follows, while the antagonist is the main character or force against them. Another common mistake is thinking the antagonist must always be evil; in modern stories, an antagonist can be sympathetic or morally complex.
Synonyms
villain (Usually suggests an evil or morally bad character, while an antagonist can simply oppose the protagonist without being evil.)
|
opponent (More general and not limited to stories; lacks the specific narrative-role meaning of ‘antagonist’.)
Antonyms
protagonist (The main character the audience is meant to follow or sympathize with, usually opposed by the antagonist.)
|
hero (Commonly used for a good or admirable main character, in contrast to the opposing antagonist.)
Collocations
main antagonist
|central antagonist
|the film's antagonist
|the story's antagonist
|protagonist and antagonist
Themes
entertainment
|literature
|media
|arts_entertainment
|communication
Examples
- In the novel, the true antagonist is not a person but a powerful corporation that controls the city.
- The film’s antagonist starts as the hero’s best friend, then slowly turns against him.
- Critics praised the antagonist for being complex and morally ambiguous rather than a simple bad guy.
- The director explained that the monster is only a symbolic antagonist representing the main character’s fear.
- By the final season, the former mentor has clearly become the show’s primary antagonist.
Learner examples
- In this movie, the king is the main antagonist.
- The antagonist makes many problems for the hero.
- The story is boring because the antagonist is not very strong.
- The audience feels sorry for the antagonist at the end.
- The hero and the antagonist fight in the last scene.
Noun
formal
C1
entity
2
active real-world opponent
A person or group who strongly fights against someone or something in real life, not in a story.
Usage pattern:
[someone] is an antagonist of [someone/something]
Common mistake:
Learners may think ‘antagonist’ can be used for any small or casual disagreement. It usually suggests a more serious, ongoing, or organized opposition. Also, some learners use ‘antagonist’ only for people, but it can also refer to groups or institutions (for example, ‘corporate antagonists of the policy’).
Synonyms
adversary (Very close in meaning; slightly more common in everyday and journalistic use, and sounds a bit less academic than ‘antagonist’.)
|
opponent (Common in sports, politics, and debate; may suggest simple competition rather than deep or hostile conflict.)
|
enemy (Stronger emotional and often hostile tone, while ‘antagonist’ can be more neutral or analytical.)
Antonyms
ally (Someone who actively supports you, the opposite of an antagonist who actively opposes you.)
|
supporter (A person who helps or agrees with a person or cause, contrasted with an antagonist who resists it.)
Collocations
political antagonist
|longtime antagonist
|bitter antagonist
|chief antagonist
|antagonist of reform
Themes
conflict
|politics
|society
|relationships
Examples
- Over the years, the senator turned many of his early allies into vocal antagonists.
- The movement’s main antagonist was a powerful business lobby that opposed any new regulations.
- She saw the media not as a partner in democracy but as an antagonist to be constantly attacked.
- Labor leaders warned that treating workers as antagonists would only deepen the conflict.
- Historically, the two countries have been regional antagonists competing for influence and resources.
Learner examples
- The company faced many antagonists when it tried to build the new factory.
- He became an antagonist of the plan after he lost his job.
- The mayor called her biggest political antagonist to make peace.
- These groups are not friends; they are old antagonists.
- The new law has many supporters but also strong antagonists.
Noun
technical
C1
entity
3
drug that blocks receptor action
In medicine, a drug that attaches to a cell’s receptor and stops another chemical or drug from working normally.
Usage pattern:
[a drug] is an antagonist of [a receptor]
Common mistake:
Learners may confuse ‘antagonist’ with ‘agonist’ because the words look similar. In pharmacology, an agonist turns a receptor ‘on’, while an antagonist blocks it or turns it ‘down’. Another mistake is thinking any drug that has side effects is an antagonist; the word describes how it works at receptors, not whether it is ‘good’ or ‘bad’.
Synonyms
blocker (Informal or short form used in medical contexts (for example, ‘beta blocker’) to mean a type of antagonist targeting specific receptors.)
Antonyms
agonist (An agonist activates a receptor to produce a biological response, whereas an antagonist blocks or reduces that response.)
Collocations
receptor antagonist
|dopamine antagonist
|beta-adrenergic antagonist
|competitive antagonist
|serotonin antagonist
Themes
science
|medicine
|health
Examples
- The new drug acts as a selective serotonin antagonist with few side effects.
- Beta-adrenergic antagonists are often prescribed to manage high blood pressure.
- Because it is a competitive antagonist, higher doses of the agonist can overcome its blocking effect.
- The researchers compared the effects of an opioid agonist and its corresponding antagonist in animal models.
- Histamine receptor antagonists are widely used to treat allergies and stomach acid problems.
Learner examples
- This medicine is an antagonist that blocks pain signals in the brain.
- Doctors gave him an antagonist to stop the effects of the drug.
- An antagonist can sit on a receptor and keep other chemicals out.
- Some heart medicines are called antagonists because they block certain signals.
- The scientist tested how strong the new antagonist was at the receptor.
Noun
technical
C2
entity
4
muscle that opposes another
In the body, a muscle that does the opposite movement of another muscle at the same joint.
Usage pattern:
[a muscle] is the antagonist to [another muscle]
Common mistake:
Learners sometimes think ‘antagonist muscle’ means a ‘bad’ or ‘harmful’ muscle because of the everyday sense of ‘antagonist’ as an enemy. In anatomy, it simply means the muscle that does the opposite movement, not a negative one.
Synonyms
opposing muscle (Descriptive phrase used in explanations; less precise as a technical term than ‘antagonist’.)
Antonyms
agonist (muscle) (The agonist is the primary muscle causing a movement, while the antagonist produces the opposite movement.)
Collocations
antagonist muscle
|agonist and antagonist
|antagonist–agonist pair
|contracting agonist, relaxing antagonist
Themes
science
|health
|sports
|body
Examples
- During elbow flexion, the biceps brachii acts as the agonist and the triceps brachii as the antagonist.
- Proper strength training should work both the prime mover and its antagonist muscle to prevent injury.
- In this exercise, the quadriceps are the agonists and the hamstrings function as the antagonists.
- When the agonist contracts, the antagonist must relax to allow smooth movement at the joint.
- Imbalance between an agonist and its antagonist can lead to poor posture and joint pain.
Learner examples
- When you bend your arm, one muscle is the agonist and the other is the antagonist.
- The therapist showed me which muscle is the antagonist for this movement.
- We trained the antagonist muscle to keep the joint safe.
- If the antagonist is too tight, you cannot move well.
- Every main muscle has an antagonist that does the opposite action.
Grammar
Dictionary form
antagonist
IPA
GB/æntˈæɡənɪst/
US/æntˈæɡənɪst/
Syllables & stress
ant - ag - on - ist (4 syllables)
Stress on 2nd syllable (ag)
Word forms
Noun
- Base: antagonist
- Plural: antagonists
Word family
Forms
antagonists
noun
Core family
Related words
antagonistically
adverb
Negative and opposite forms
protagonist
noun B2
Expressions
antagonist muscle
1/æntˈæɡənɪst mˈʌsəl/
fixed phrase
technical
muscle that opposes another muscle
A muscle that makes the opposite movement of another muscle at the same joint.
Examples
- Stretching the antagonist muscle after lifting can help reduce soreness.
- Trainers often design workouts that balance the agonist muscle and the antagonist muscle.
- Weakness in the antagonist muscle can cause the joint to move in an unhealthy way.
main antagonist
1/mˈeɪn æntˈæɡənɪst/
fixed phrase
primary opposing character in story
The most important character who fights against the hero in a story, show, or movie.
Examples
- The main antagonist doesn’t appear until halfway through the film.
- In this series, the main antagonist changes every season as new threats arrive.
- Although he is the main antagonist, many viewers still sympathize with his motives.
protagonist and antagonist
1/pɹoʊtˈæɡənɪst ˈænd æntˈæɡənɪst/
fixed phrase
hero and opposing character together
The main character in a story and the main character who fights against that person.
Examples
- In this play, the line between protagonist and antagonist is deliberately blurred.
- The writing workshop focused on building strong conflicts between the protagonist and antagonist.
- Students had to describe the relationship between the protagonist and antagonist in the novel.
protagonist and antagonist
1/pɹoʊtˈæɡənɪst ˈænd æntˈæɡənɪst/
fixed phrase
main character and opponent
the main character and the one who fights them
Examples
- The film blurs the line between protagonist and antagonist.
- Good thrillers build tension by giving both the protagonist and antagonist strong motives.
receptor antagonist
1/ɹisˈɛptɚ æntˈæɡənɪst/
fixed phrase
technical
substance that blocks a receptor
A chemical or drug that sits on a certain receptor in the body and stops that receptor from working normally.
Examples
- This medication is a receptor antagonist that reduces the effect of adrenaline on the heart.
- Researchers developed a new receptor antagonist to block the virus from entering cells.
- As a receptor antagonist, the compound prevents the natural hormone from triggering its usual response.