A.“-εύσομαι” D.19.242: aor. “ἐνεανιευσάμην” Id.21.69:—Pass. (v. infr.):—to be a youth, Ph.1.303, Poll. 2.20.
II. more freq., act like a hot-headed youth, wilfully or wantonly, swagger, Ar.Fr.827, Lys Fr.324 S.; ν. εἰς τοὺς πολίτας behave so towards . . , Isoc.20.17, cf. Hyp.Eux.27; “ἐν τοῖς λόγοις” Pl.Grg. 482c; “νεανιευσάμενος εἰπεῖν” with youthful insolence, Plu.Cic.1:— Pass., ἐφ᾽ ἅπασι τοῖς ἑαυτῷ νενεανιευμένοις to all his wanton acts, D. 21.18; “τὰ ἐν τῇ βουλῇ νεανιευθέντα” Plu.Mar.29.