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Word

deteriorate

verb C1
UK /dɪˈtɪə.ɹɪə.ɹeɪt/
US /dɪˈtɪɹ.iə.ɹeɪt/

Meanings

verb

to become worse in quality, condition, or effectiveness

deteriorate: to become worse in quality, condition, or effectiveness
verb

to make something become worse in quality, condition, or effectiveness

deteriorate: to make something become worse in quality, condition, or effectiveness

Definition

To deteriorate means to become worse in quality, condition, or performance over time.

When something deteriorates, it gradually declines from a better state to a worse one. This can describe physical objects, situations, relationships, or a person’s condition. It often suggests a noticeable change caused by time, stress, neglect, or poor circumstances.

Examples

  • Without regular maintenance, the old bridge began to deteriorate faster than engineers had predicted.
  • After weeks of unresolved tension, their working relationship started to deteriorate during meetings.
  • If you store the painting in direct sunlight, the colors will deteriorate and lose their depth.
  • As the conflict escalated, the security situation continued to deteriorate despite repeated negotiations.

Common mistake

Learners often confuse deteriorate (become worse) with deteriorate into, which is uncommon; use deteriorate or deteriorate to instead (e.g., 'deteriorate to chaos').