G2204–ζέω–zeō

This man had been trained in the way of the Lord; and burning in spirit, he gave himself up to teaching the facts about Jesus, though he had knowledge only of John's baptism:

ζέων zeōn “being fervent”

Be not slow in your work, but be quick in spirit, as the Lord's servants;

ζέοντες, zeontes “being fervent,”