deteriorate

deteriorate — verb

1. to gradually move from a good or acceptable state to a poorer or weaker one over

1.verbintransitiveB2
Definition

to gradually move from a good or acceptable state to a poorer or weaker one over time — for example, when a building falls apart, a relationship gets worse, or someone's health declines.

Example

Amira watched her father's health deteriorate as the illness grew stronger each month.

The old wooden bridge had deteriorated so much that the council closed it.

passive: had deteriorated so much that — result clause

Common collocations
  • deteriorate rapidly
  • deteriorate gradually
  • deteriorate significantly
  • deteriorate into chaos
  • deteriorate further
  • health deteriorates
  • quality deteriorates
  • condition deteriorates
  • relationship deteriorates
Synonyms
  • worsen

    more direct and common; can be used both transitively and intransitively

  • decline

    suggests a gradual downward movement over time, often used for health, quality, or numbers

  • degenerate

    implies decline to a lower moral, physical, or quality state; stronger negative connotation

  • decay

    suggests natural, gradual breakdown, especially of physical objects or organic matter

Antonyms
  • improve

    the most direct antonym; to move to a better state

  • strengthen

    used when something becomes stronger rather than weaker

  • recover

    specifically for returning to a previous good state after decline, especially health

Grammar Patterns

deteriorate + adverb (gradually, rapidly)

deteriorate into + noun phrase

deteriorate from + noun + to + noun

Usage Note

Commonly used as an intransitive verb. The transitive use ('The recession deteriorated the economy') is considered non-standard by most usage guides; use 'worsen' or 'damage' instead for transitive contexts.

Common Mistakes

The storm deteriorated the roof.
The storm damaged the roof.
'deteriorate' is rarely transitive; the roof deteriorated because of the storm, not 'the storm deteriorated the roof.'
His condition deteriorated worse.
His condition deteriorated.' or 'His condition grew worse.
'deteriorate' already means 'become worse,' so adding 'worse' is redundant.

Word family

  • deterioration
    nounB2
  • deteriorating
    adjectiveB2
  • deteriorated
    adjectiveB2
  • deteriorative
    adjectiveC1

Synonym discussion

Sense: verb/1

All four words describe a movement from a better to a worse state, but they differ in scope and connotation. 'Worsen' is the most direct and versatile synonym — it can be transitive ('The drought worsened the crisis') or intransitive ('The crisis worsened'), and covers any kind of negative change. 'Decline' implies a gradual, measured downward movement, commonly used for health, economic indicators, or quality ('Her health declined after the surgery'). 'Degenerate' carries a much stronger moral or qualitative judgement — it suggests falling to a base, corrupted, or degraded state ('The debate degenerated into shouting matches'). 'Decay' emphasises natural, organic breakdown, especially of physical materials or structures ('The abandoned house slowly decayed'). For everyday situations where something simply gets worse over time, 'deteriorate' or 'worsen' are the safest choices; 'degenerate' and 'decay' imply a more specific type of decline.

worsen ↗decline ↗degenerate ↗decay ↗

Common collocations

Nouns

Adverbs

Phrases

  • begin to deteriorate
  • continue to deteriorate
  • start to deteriorate
  • cause something to deteriorate

Prepositions

Etymology

LatinFrenchEnglish

From Latin 'dēteriōrāre' meaning 'to make worse', which comes from 'dēterior' meaning 'worse, lower, inferior'. The Latin root 'dēterior' itself is built from 'dē-' (down, away from) combined with a comparative suffix. The word entered English in the late 16th century and originally carried a transitive meaning ('to make worse'), but since the 18th century the intransitive sense ('to become worse') has become dominant. This shift reflects a common pattern in English where Latin-derived verbs gradually lose their causative force and settle into an intransitive, state-change meaning.