DETERIORATION
deterioration, decline in quality, declension, worsening
(noun) process of changing to an inferior state
deterioration, impairment
(noun) a symptom of reduced quality or strength
Source: WordNet® 3.1
Etymology
Noun
deterioration (countable and uncountable, plural deteriorations)
The process of making or growing worse, or the state of having grown worse.
Synonym: retrogression
Antonym: amelioration
Source: Wiktionary
De*te`ri*o*ra"tion, n. Etym: [LL. deterioratio: cf. F.
détérioration.]
Definition: The process of growing worse, or the state of having grown
worse.
Source: Webster’s Unabridged Dictionary 1913 Edition