deterioration

Từ điển Oxford Advanced Learner 8th

de·teri·or·ation [deterioration deteriorations] BrE [dɪˌtɪəriəˈreɪʃn] ; NAmE [dɪˌtɪriəˈreɪʃn] noun uncountable, countable
•a serious deterioration in relations between the two countries
Main entry: ↑deteriorate_derived

• Từ đồng nghĩa / Synonyms:
  decline in quality, declension, worsening, impairment