Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
δυναστεύσαι to overpower LXX.1Chr.16.21
δυναστεύουσι being in power LXX.Jer.13.18
δυναστεύειν to be in power LXX.Prov.19.10
δυναστευούσησ woman being in power LXX.2Kgs.10.13

Liddell-Scott-Jones

δυναστεύω (dunasteuō) be in power G:V

δυναστεύω-εύω,

hold power or lordship, be powerful or influential, [Refs 5th c.BC+]; τὸ-εῦον, opposed to δῆμος, [Refs 5th c.BC+]: with genitive, to be lord over, Οἰχαλίας [Refs 1st c.BC+]: generally, prevail, be prevalent, of a wind, of climate, [Refs 5th c.BC+]; to be influential, potent, ἐν τῷ σώματι [Refs 3rd c.BC+]:—passive, to be ruled, πρὸς μυρίων [Refs 1st c.AD+]

__II in Mathematics texts, in passive, to be concerned with powers of numbers, [Refs 5th c.BC+]