decrepitate Syllabification: (de·crep·i·tate)Pronunciation: /diˈkrəpiˌtāt/Definition of decrepitate verb [no object] technical (of a crystal or an inclusion of something within a crystal) disintegrate audibly when heated. Derivatives decrepitationPronunciation: /-ˌkrepiˈtāSHən/ noun Origin: mid 17th century: from de- 'away' + Latin crepitat- 'crackled', from the verb crepitare, frequentative of crepare 'rattle' (see decrepit)decrepitate in other Oxford dictionaries Definition of decrepitate in the British & World English dictionary