βαρβαρίζω

A. behave or speak like a barbarian, Hdt. 2.57, Philostr. VA 1.21, Arr. An. 7.6.5; speak broken Greek, speak gibberish, Pl. Tht. 175d codd. (sed leg. βατταρίζων); βαρβαριζόντων ἑτεροφώνων Phld. Po. 994.6; violate the laws of speech, commit barbarisms, τῇ λέξει β. Arist. SE 165b21, cf. Plb. 39.1.7, Str. 14.2.28, Luc. Rh.Pr. 17, 23, etc.; distd. from σολοικίζω, Phld. Rh. 1.154 S.

2. trans., 'murder', mangle, τὴν Ῥωμαίων φωνήν Luc. Merc.Cond. 24.

II. side with the barbarians, i.e. the Persians, X. HG 5.2.35, Max.Tyr. 4.2.