πείρας

From LSJ

καὶ ὑποθέμενος κατὰ τῆς κεφαλῆς φέρειν τὰς πληγάς, ὡς ἐν ἐκείνῃ τοῦ τε κακοῦ τοῦ πρὸς ἀνθρώπους → and having instructed them to bring their blows against the head, seeing that the harm to humans ... (Josephus, Antiquities of the Jews 1.50)

Source

French (Bailly abrégé)

1ασα, αν;
part. ao. de πείρω.
2gén. sg. ou acc. pl. de πεῖρα.

Russian (Dvoretsky)

πείρας: ασα, αν part. aor. к πείρω.

Dutch (Woordenboekgrieks.nl)

πείρας -ασα -αν ptc. aor. act. van πείρω.