From exesti (in the sense of ability); privilege, i.e. (subjectively) force, capacity, competency, freedom, or (objectively) mastery (concretely, magistrate, superhuman, potentate, token of control), delegated influence -- authority, jurisdiction, liberty, power, right, strength.

see GREEK exesti

ἐξουσίᾳ (exousia) − 29 Occurrences

ἐξουσίαι (exousiai) − 1 Occurrence

ἐξουσίαις (exousiais) − 3 Occurrences

ἐξουσίαν (exousian) − 56 Occurrences

ἐξουσίας (exousias) − 12 Occurrences

ἐξουσιῶν (exousiōn) − 1 Occurrence