deteriorateyoudaoicibaDictYouDict[deteriorate 词源字典]
deteriorate: [16] The meaning of deteriorate resides etymologically in its first syllable, which represents the Latin preposition dē ‘down’. To this was added the adjectival suffix -ter, to produce *dēter ‘bad’, and this in turn was modified with the comparative suffix -ior to dēterior ‘worse’. Dēterior formed the basis of the verb dēteriorāre ‘get worse’, source of English deteriorate.
[deteriorate etymology, deteriorate origin, 英语词源]
deteriorate (v.)youdaoicibaDictYouDict
1640s (as a past participle adjective, 1570s), from Late Latin deterioratus, past participle of deteriorare "get worse, make worse," from Latin deterior "worse, lower, inferior, meaner," contrastive of *deter "bad, lower," from PIE *de-tero-, from demonstrative stem *de- (see de). Originally transitive in English; intransitive sense is from 1758. Related: Deteriorated; deteriorating.