ἀττικίζειν
From LSJ
ἐγγυητής τοῦ ἀργυρίου ἀξιόχρεως → trustworthy guarantor for the money
Lexicon Thucydideum
ab Atheniensibus stare, to side with the Athenians, 3.62.1 (de Plataeensibus concerning the Plataeans), 8.87.1 (de Thissapherne concerning Tissaphernes).