Katharevusa

[kah-thuh-rev-uh-sah, -suh, kath-uh-; Greek kah-thah-re-voo-sah] /ˌkɑ θəˈrɛv əˌsɑ, -sə, ˌkæθ ə-; Greek ˌkɑ θɑˈrɛ vu sɑ/
noun
1.
the puristic Modern Greek literary language (distinguished from Demotic).
Also called Hellenic.
British Dictionary definitions for Katharevusa

Katharevusa

/ˌkɑːθəˈrɛvəˌsɑː/
noun
1.
a literary style of Modern Greek, derived from the Attic dialect of Ancient Greek and including many archaic features Compare Demotic