deterioration
gb/dɪtˈɪɹiɚˌeɪʃən/ us/dɪtˈɪɹiɚˌeɪʃən/
C1
English
~ 9100
Senses
0 senses
Noun
C1
event
1
process of something becoming worse
The process when something, like a situation or quality, slowly becomes worse than before.
Usage pattern:
the deterioration of [something]; deterioration in [something]
Common mistake:
Learners often confuse the noun "deterioration" with the verb "deteriorate". Use "deterioration" with articles and prepositions (e.g., "a deterioration in sales", "the deterioration of standards"), and "deteriorate" as a verb (e.g., "sales deteriorated", "relations deteriorated"). Another common mistake is using the wrong preposition; the most natural patterns are "deterioration in [something]" and "deterioration of [something]".
Synonyms
decline (A bit more general and slightly simpler; can sound less negative or dramatic than "deterioration".)
|
worsening (Very close in meaning; more informal and more commonly used as a verb form.)
|
degradation (Often used for moral, environmental, or quality loss; can sound more formal or technical.)
Antonyms
improvement (Direct opposite: a process where something becomes better instead of worse.)
|
progress (Opposite in many contexts, emphasizing positive development rather than decline.)
Collocations
gradual deterioration
|serious deterioration
|sudden deterioration
|deterioration in relations
|deterioration in conditions
|economic deterioration
Themes
daily life
|society
|business
|core_vocabulary
Examples
- There has been a noticeable deterioration in working conditions at the factory.
- The report warns of a serious deterioration in relations between the two countries.
- Residents are angry about the deterioration of public services in the area.
- Analysts blame the deterioration in the company’s performance on poor management decisions.
- The sudden deterioration of the political situation caught everyone by surprise.
Learner examples
- We are worried about the deterioration in the quality of our food.
- There was a clear deterioration in the company’s results last year.
- People complained about the deterioration of the bus service.
- The news talked about a deterioration in the security situation.
- The manager wants to stop any further deterioration in customer satisfaction.
unknown
C1
event
2
wearing down or damage over time
Slow damage or wear to something physical, like a building or material, as time passes.
Usage pattern:
the deterioration of [a physical thing]
Common mistake:
Learners sometimes use "broken" or "old" instead of describing the process as "deterioration". Use "deterioration" when you want to talk about the ongoing or gradual damage (e.g., "the deterioration of the roof"), not just the final result. Another mistake is to use it without a specific physical thing: here it should refer to a concrete object or material, not an abstract situation.
Synonyms
decay (Often used for organic matter (like teeth or wood) and can sound slightly less formal.)
|
wear and tear (Informal phrase for normal, expected deterioration from regular use.)
|
corrosion (A technical term mainly for metals damaged by chemical reactions, especially rust.)
Antonyms
preservation (Opposite focus: keeping something in good condition rather than letting it decay.)
|
restoration (Opposite process: actively repairing damage caused by deterioration.)
Collocations
physical deterioration
|structural deterioration
|deterioration of the building
|deterioration of materials
|deterioration of teeth
Themes
science
|environment
|health
|core_vocabulary
Examples
- The metal showed significant deterioration after years of exposure to salt water.
- Regular maintenance can slow the deterioration of the bridge’s supports.
- Experts were called in to assess the deterioration of the historic church’s stonework.
- Poor storage conditions led to the rapid deterioration of the paintings.
- Fluoride toothpaste can help prevent the deterioration of tooth enamel.
Learner examples
- Rain and wind caused the deterioration of the old house.
- We saw clear deterioration in the walls of the tunnel.
- Good care can slow the deterioration of a car.
- The museum works to stop the deterioration of old books.
- The doctor checked for deterioration of the bone.
Noun
technical
C1
event
3
worsening of physical or mental health
The process when someone’s body or mind becomes less healthy or weaker.
Usage pattern:
deterioration in [someone’s] condition; deterioration of [a function or ability]
Common mistake:
Learners sometimes say "his health is more bad" instead of using a noun phrase like "a deterioration in his health" or "a deterioration in his condition". In medical or formal contexts, use "deterioration" for this ongoing negative change. Also, avoid saying *"deterioration of he"*; use "deterioration of his health" or "deterioration in his condition".
Synonyms
decline (Common in medical speech ("health decline" or "cognitive decline"), often slightly less formal than "deterioration".)
|
degeneration (More technical; often used for specific tissues or functions (e.g., "muscle degeneration").)
|
worsening (Everyday term; less specifically medical but widely used in reports of health changes.)
Antonyms
recovery (Opposite process: returning to a better or healthier state.)
|
stabilization (Opposite in clinical contexts where the important thing is that the condition stops getting worse.)
Collocations
deterioration in health
|deterioration in her condition
|cognitive deterioration
|mental deterioration
|neurological deterioration
Themes
health
|medicine
Examples
- Doctors are concerned about the sudden deterioration in her condition.
- Early treatment can prevent further deterioration of vision.
- The scans showed no deterioration of brain function over the last year.
- Family members reported a gradual deterioration in his memory and mood.
- The new drug appears to slow the deterioration associated with the disease.
Learner examples
- The nurse watched for any deterioration in the patient’s health.
- There has been a slow deterioration in his memory.
- Medicine can stop the deterioration of her sight.
- They are worried about the deterioration in their father’s condition.
- The doctor said there was no deterioration since the last visit.
Grammar
Dictionary form
deterioration
IPA
GB/dɪtˈɪɹiɚˌeɪʃən/
US/dɪtˈɪɹiɚˌeɪʃən/
Syllables & stress
de - teri - or - a - tion (5 syllables)
Stress on 2nd syllable (teri)
Word forms
Noun
- Base: deterioration
- Plural: deteriorations
Word family
Forms
deteriorations
noun
Core family
deteriorate
verb B2
Negative and opposite forms
improve
verb A2
improvement
noun A2
Expressions
deterioration in health
1/dɪtˈɪɹiɚˌeɪʃən ˈɪn hˈɛlθ/
fixed phrase
worsening of someone’s health
A phrase used to say that a person’s health has become worse.
Examples
- The doctor noted a clear deterioration in health over the past six months.
- Stress and poor diet can lead to a serious deterioration in health.
deterioration in relations
1/dɪtˈɪɹiɚˌeɪʃən ˈɪn ɹilˈeɪʃənz/
fixed phrase
worsening of relations between sides
A phrase used to say that the relationship between two groups, people, or countries has become worse.
Examples
- Sanctions have caused a sharp deterioration in relations between the two countries.
- There has been a gradual deterioration in relations between management and staff.