Greek word
zēlos
ζῆλος
What it means
properly, heat, i.e. zeal (in a favorable sense, ardor
properly, heat, i.e. (figuratively) "zeal" (in a favorable sense, ardor; in an unfavorable one, jealousy, as of a husband (figuratively, of God), or an enemy, malice)
Where it comes from
from zéō (ζέω)