ἰσχύω
(< ἰσχύς), [in LXX for חזק, גִּבּוֹר, עצם, etc.;]
1. to be strong in body: Mt 9:12, Mk 2:17.
2. to be powerful, have power, prevail: Ac 19:20, Re 12:8; seq. κατά, c. gen. pers., Ac 19:16; c. inf., to be able (MM, Exp., xv): Mt 8:2826:40, Mk 5:49:18 (inf. understood) 14:37, Lk 6:488:4313:2414:6, 29, 3016:320:26, Jo 21:6, Ac 6:1015:1025:727:16; c. acc., Phl 4:13, Ja 5:16; of things, to avail, be serviceable (MM, Exp., xv): Mt 5:13, Ga 5:6, He 9:17 (cf. ἐν-, ἐξ-, ἐπ-, κατ-ισχύω).†