Katharevousa
noun
Ka·tha·re·vou·sa ˌkä-thə-ˈre-və-ˌsä 
variants or Katharevusa
: modern Greek conforming to classic Greek usage
Word History
Etymology
Modern Greek kathareuousa, from Greek, feminine of kathareuōn, present participle of kathareuein to be pure, from katharos pure
First Known Use
1936, in the meaning defined above