deterioration
noun/dɪˌtɪəriəˈreɪʃn/
/dɪˌtɪriəˈreɪʃn/
[uncountable, countable]- the fact or process of becoming worse
- deterioration (in something) a serious deterioration in relations between the two countries
- deterioration (into something) her deterioration into severe depression
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deterioration