Strong's G1754 — ἐνεργέω (verb)
energeo (en-erg-eh'-o) v.
1. to be active, efficient
[from G1756]
KJV: do, (be) effectual (fervent), be mighty in, shew forth self, work (effectually in) 
Root(s): G1756 
Hebrew root: ἐνεργής
Occurrences: 21