C1verb2K

Deteriorate

UK /["/dɪˈtɪəriəreɪt/","/dɪˈtɪəriəreɪts/","/dɪˈtɪəriəreɪtɪd/","/dɪˈtɪəriəreɪtɪŋ/"]/US /["/dɪˈtɪriəreɪt/","/dɪˈtɪriəreɪts/","/dɪˈtɪriəreɪtɪd/","/dɪˈtɪriəreɪtɪŋ/"]/

Definition

to become worse

In simple words: to become worse over time

Examples

  • Her health deteriorated rapidly, and she died shortly afterwards.
  • They had to cope with deteriorating weather conditions.
  • The discussion quickly deteriorated into an angry argument.
  • Relations between the two countries have deteriorated further this week.
  • The situation is likely to deteriorate unless something is done now.
  • The unrest rapidly deteriorated into civil war.
  • The overall quality of rivers and canals has deteriorated.

Usage notes

Used in both speaking and writing to describe things that are getting worse, such as physical health, buildings, or relationships. Avoid in casual conversations unless discussing specific issues.

Grammar pattern

deteriorate + (subject)

Memory hint

Sounds like 'the tear rate' — imagine something wearing out quickly.

Collocations

  • badly
  • seriously
  • severely
  • begin to
  • continue to
  • be likely to
  • into

Synonyms

  • decline
  • worsen
  • degenerate
  • diminish
  • collapse

Antonyms

  • improve
  • enhance
  • repair

Common mistakes

  • Confused with 'depreciate' when discussing value loss.
  • Used intransitively, e.g., 'The situation deteriorates.' should specify what is deteriorating.
  • Overusing it in contexts where simpler words like 'get worse' could apply.