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deteriorate

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verb [intransitive] British English pronunciation: deteriorate /dɪˈtɪəriəreɪt/ 
Word Forms
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present tense
I/you/we/theydeteriorate
he/she/itdeteriorates
present participledeteriorating
past tensedeteriorated
past participledeteriorated
  1. to become worse

    The weather deteriorated rapidly so the game was abandoned.

    deteriorate into:

    The economic situation could quickly deteriorate into social unrest.

derived word

deterioration

 British English pronunciation: deterioration /dɪˌtɪəriəˈreɪʃ(ə)n/  noun [uncountable]

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