vitality
From LSJ
κρῖναι δὲ λόγῳ πολύδηριν ἔλεγχον ἐξ ἐμέθεν ῥηθέντα → judge by reason the too much contested argument which has been given by me
κρῖναι δὲ λόγῳ πολύδηριν ἔλεγχον ἐξ ἐμέθεν ῥηθέντα → judge by reason the too much contested argument which has been given by me
strength: P. and V. ἰσχύς, ἡ, ῥώμη, ἡ.
possess vitality, be strong, v.: P. and V. ἰσχύειν.