TBESG:ἀποπειράομαιto put to the testto make trial, essay , or proof of a thing or person, c. gen., [Refs 5th c.BC], attic:—;so also in Act., ἀποπειρᾶσαι τοῦ Πειραιῶς to make an attempt on the Peiraeeus, [Refs 5th c.BC] (ML)