ζέω zeō dzeh'-o A primary verb; to be hot (boil, of liquids; or glow, of solids), that is, (figuratively) be fervid (earnest)KJV Usage: be fervent.
Acts 18:25 (KJV_Strongs) 25 G3778 This man G2258 was [G5713] G2727 instructed in [G5772] G3598 the way G2962 of the Lord G2532 ; and G2204 being fervent [G5723] G4151 in the spirit G2980 , he spake [G5707] G2532 and G1321 taught [G5707] G199 diligently G4012 the things of G2962 the Lord G1987 , knowing [G5740] G3440 only G908 the baptism G2491 of John.
Acts 18:25 (IGNT) 25 G3778 ουτος He G2258 (G5713) ην Was G2727 (G5772) κατηχημενος Instructed In G3588 την The G3598 οδον Way G3588 του Of The G2962 κυριου Lord, G2532 και And G2204 (G5723) ζεων G3588 τω Being Fervent G4151 πνευματι In Spirit, G2980 (G5707) ελαλει He Spoke G2532 και And G1321 (G5707) εδιδασκεν Taught G199 ακριβως Accurately G3588 τα The Things G4012 περι Concerning G3588 του The G2962 κυριου Lord, G1987 (G5740) επισταμενος Knowing G3440 μονον Only G3588 το The G908 βαπτισμα Baptism G2491 ιωαννου Of John.
Romans 12:11 (KJV_Strongs) 11 G3361 Not G3636 slothful G4710 in business G2204 ; fervent [G5723] G4151 in spirit G1398 ; serving [G5723] G2962 the Lord;
Romans 12:11 (IGNT) 11 G3588 τη In G4710 σπουδη Diligence, G3361 μη Not G3636 οκνηροι Slothful; G3588 τω In G4151 πνευματι Spirit, G2204 (G5723) ζεοντες Fervent; G3588 τω In G2540 καιρω Season G1398 (G5723) δουλευοντες Serving.