IPA: //ˌkætəˈkrɛstɪk//
KK: /kætəˈkrɛstɪk/
Relating to the misuse of a word or phrase, often in a way that creates a new meaning or expression.
The poet's catachrestic use of language added a unique twist to his work.
Catachrestic → It is formed from "cata-" (from Greek "kata", meaning down or against) and "chrestikos" (from Greek "chrestos", meaning useful or serviceable). The term refers to a use of a word in a way that is not its proper or literal meaning, often to fill a gap in language, hence the idea of using something 'against' its usual meaning.
Think of using a word 'against' its usual meaning ('cata-') to fill a gap in language, which is what catachrestic refers to.