βαρβαρισμός

A. use of a foreign tongue or of one's own tongue amiss, barbarism, Arist. Po. 1458a26, Diog.Bab.Stoic. 3.214, Ph. 1.124, Plu. 2.731e; μιᾶς λέξεως κακία ὁ β., ἐπιπλοκῆς δὲ λέξεων ἀκαταλλήλων ὁ σολοικισμός A.D. Synt. 198.7.