A.“-ι^οῦμαι” Lys.6.35, Isoc.17.24: aor. “ἰσχυ_ρι^σάμην” Th.5.26, Pl.Grg.489c:—make oneself strong, be strong, ἰσχυριζόμενος ὑφ᾽ ἵππων σίδηρος gaining force from the impetus of the horses, X.Cyr.6.4.18.
II. use one's strength, τῷ σώματι Pl.l.c.; esp. in overcoming resistance, “πρὸς τὸ πολὺ ἧττον” Arist.Pr.951a13; “εἰς τοὺς ἀσθενεῖς” Id.EN1124b23; contend stoutly, “ὑπὲρ ἄθλων” Ael.NA 15.15; persist or continue obstinately in doing . . , c. part., Th.7.49: abs., ibid.; esp. by word of mouth, maintain stiffly, obstinately, c. acc. et inf., Id.3.44, Is.11.1; “ταῦτα” Pl.Grg.495b; “ὅτι . . , ὡς . . ” Th. 4.23,6.55, Pl.Tht.172b; “περί τινος” Id.Sph.249c.