strain

strain — noun

1. a force that pushes, pulls, or stretches an object, sometimes reaching a point w

1.nounB2
Definition

a force that pushes, pulls, or stretches an object, sometimes reaching a point where the object is at risk of damage or breaking

Example

The old bridge was not designed to handle the strain of modern heavy trucks.

strain of + noun phrase showing source of pressure

Min checked every knot for signs of strain before beginning the climb.

signs of strain — visible evidence of pressure

Common collocations
  • put strain on
  • place strain on
  • signs of strain
  • under strain
  • strain on something
Synonyms
  • tension

    more specific to the state of being stretched tight; strain focuses on the force applied

  • stress

    broader; can mean mental or physical; strain usually implies physical deformation

  • pressure

    less specific to stretching; can be from any direction

Antonyms

Usage Note

Often used with 'put/place (a) strain on [something]' to describe what is being stressed. Common in engineering and construction contexts, but also used for everyday physical tension (e.g., the strain on a rope).

Common Mistakes

The stress on the rope was too much.
The strain on the rope was too much.
In physics, 'stress' is force per area; 'strain' is the deformation caused by stress. In everyday use, 'strain' is preferred for physical pulling/stretching.

2. a sore, swollen condition in muscle tissue caused by overstretching or overworki

2.nounB1
Definition

a sore, swollen condition in muscle tissue caused by overstretching or overworking it beyond what it can handle

Example

Shirin pulled a muscle in her leg and the doctor diagnosed a mild strain.

mild strain — severity gradation

Runners often get a hamstring strain if they skip their warm-up exercises before a race.

hamstring strain — specific body part collocation

Common collocations
  • muscle strain
  • hamstring strain
  • back strain
  • groin strain
  • suffer a strain
  • mild strain
  • severe strain
Synonyms
  • sprain

    affects ligaments (connecting bone to bone), not muscles/tendons

  • pull

    more informal; a 'pulled muscle' is the same as a muscle strain

Usage Note

Distinguish from sprain: a strain affects muscles or tendons, while a sprain affects ligaments (tissue connecting bones at a joint). Commonly modified by the body part: 'hamstring strain', 'back strain', 'groin strain'.

Common Mistakes

The doctor said I sprained my back muscle.
The doctor said I strained my back muscle.
A sprain is for ligaments; a strain is for muscles and tendons.

3. a feeling of worry, anxiety, or nervousness caused by having too many demands or

3.nounB1
Definition

a feeling of worry, anxiety, or nervousness caused by having too many demands or problems to deal with, or a situation that produces this feeling

Example

The strain of caring for two sick parents was beginning to show on Vivek's face.

the strain of + gerund — source of pressure

Financial strain often puts pressure on a marriage and can lead to arguments about money.

financial strain — common noun modifier

Common collocations
  • under strain
  • put a strain on
  • financial strain
  • emotional strain
  • mental strain
  • strain of something
  • feel the strain
  • show the strain
Synonyms
  • stress

    focuses on the psychological/physiological response; strain focuses on the burden or pressure itself

  • pressure

    implies external demands; strain implies the effect of those demands

  • tension

    suggests a state of being stretched between opposing forces

Antonyms
  • ease

    freedom from difficulty or burden

  • relief

    the removal of strain

Usage Note

Commonly appears in the pattern 'put/place (a) strain on [someone/something]' (the source of pressure) or 'under (a lot of) strain' (experiencing pressure). The container is typically not the same as 'stress' — 'strain' emphasises the burden being carried, while 'stress' focuses on the physiological/psychological response.

Common Mistakes

I am under a lot of stress of work.
I am under a lot of strain at work.
'Under strain' is a fixed phrase; 'under stress' is also correct but means something slightly different.

4. a particular quality or tendency in a person's character or in the atmosphere of

4.nounC1
Definition

a particular quality or tendency in a person's character or in the atmosphere of something, often one that is inherited or runs deep

Example

There is a strain of stubbornness in Sade that she clearly inherited from her grandmother.

a strain of + [abstract quality]

The comedian's humour has a dark strain that not everyone finds amusing at a family show.

Common collocations
  • a strain of
  • strain of stubbornness
  • strain of humour
  • strain of arrogance
  • strain of violence
  • strain of idealism
Synonyms
  • streak

    very similar; 'a stubborn streak' is more common than 'a strain of stubbornness' in everyday speech

  • vein

    more about the manner or style of something ('in a similar vein') rather than a personal quality

  • trace

    suggests a much smaller amount; a trace is barely noticeable

Grammar Patterns

a strain of + noun

Usage Note

Always singular in this sense. Typically followed by 'of' and an abstract noun (e.g., 'a strain of cruelty/melancholy/humour/idealism'). Describes a persistent, often underlying quality — not a temporary mood.

Common Mistakes

She has a stubborn strain.
She has a strain of stubbornness.
The construction requires 'of' and the abstract noun, not a bare adjective.

5. a subgroup within a species of animals, plants, or disease-causing organisms tha

5.nounB2
Definition

a subgroup within a species of animals, plants, or disease-causing organisms that has its own distinct inherited features

Example

Scientists have identified a new strain of the virus that spreads much faster than the original.

new strain of a virus — common in health news

This strain of wheat grows well in dry conditions and needs very little water compared to others.

strain of + [plant]

Common collocations
  • new strain
  • virus strain
  • bacterial strain
  • drug-resistant strain
  • different strain
  • strain of virus
  • mutant strain
Synonyms
  • type

    the most general term; less specific than strain

  • variety

    common for cultivated plants; more neutral than strain

  • breed

    specifically for domesticated animals like dogs, cats, horses

Usage Note

Very common in medical and agricultural contexts. For diseases, 'strain' refers to a variant of a virus or bacteria. For plants/animals, it refers to a subtype developed through breeding or natural selection. Not used for individual animals — the term refers to the type, not a single creature.

Common Mistakes

This is a new strain of dog I bought.
This is a new breed of dog I bought.
'Breed' is used for domesticated animals like dogs and cats; 'strain' is more common for plants, microbes, and laboratory animals.

6. a melody or piece of music that reaches the ear, particularly one heard from som

6.nounC1
Definition

a melody or piece of music that reaches the ear, particularly one heard from some distance away

Example

The sweet strain of a violin drifted through the open windows of the old concert hall.

strain of + [instrument] — literary use

Minh could hear the familiar strain of a folk song coming from a small café across the street.

Common collocations
  • strain of music
  • distant strain
  • sweet strain
  • familiar strain
  • strains of a waltz
Synonyms
  • tune

    more common and everyday; less poetic than strain

  • melody

    more technical; refers specifically to a sequence of notes

  • sound

    the most general; no implication of musical quality

Usage Note

This sense is literary and somewhat old-fashioned. In modern everyday English, 'strain' is rarely used this way — 'tune', 'melody', or 'sound' are far more common. It often appears in descriptive or poetic writing, and frequently in the plural form ('strains of music').

Idioms

A system or service that creaks under the strain is unable to handle everything it is supposed to do.

The city's bus system creaked under the strain of the festival crowds.

Our school's computer network creaked under the strain of online exams.

strain — verb

Word family

  • strained
    adjectiveB2
  • strainer
    nounB1
  • unstrained
    adjectiveC1
  • overstrained
    adjectiveC1

Synonym discussion

Sense: noun/3

These four words all describe difficult or taxing experiences, but each focuses on a different aspect. 'Strain' emphasises the burden or weight being carried — it is the load itself, whether mental, emotional, or physical. 'Stress' focuses on the body's reaction to demands, both psychological and physiological (e.g., 'stress hormones', 'stress headache'). 'Pressure' points to external forces pushing on someone — deadlines, expectations, or social demands. 'Tension' describes a state of being stretched between opposing forces, often involving uncertainty or conflict. For example: 'The financial strain of her son's university fees kept her awake at night' (the burden). 'She felt the pressure from her parents to choose a more stable career' (external demands). 'There was tension in the room after the argument' (a charged atmosphere between people). 'Job stress can lead to serious health problems' (the physical/mental reaction). In many contexts the words overlap, but picking the right one changes the shade of meaning.

Etymology

LatinFrenchEnglish

The word 'strain' comes from Old French 'estreindre', meaning to bind tightly or press together, which in turn comes from Latin 'stringere', meaning to draw tight or bind. This same Latin root gave English several related words: 'strict' (drawn tight), 'stringent' (tight, strict), 'constrict' (to squeeze), 'restrict' (to keep within limits), and 'stress' (pressure or strain). The cooking sense of straining (separating solids from liquids) developed because the original method involved squeezing or pressing the mixture through a cloth. The musical sense (a strain of melody) comes from the idea of a tune being 'drawn out' or 'extended' in sound — an older poetic usage that survives mainly in literary contexts.