Zeal
Zeal (zēl) , noun
[French zèle; compare Portuguese & Italian zelo, Sp. zelo, celo; from Latin zelus, Greek {not transcribed}, probably akin to {not transcribed} to boil. Compare Yeast, Jealous.]
1.
Passionate ardor in the pursuit of anything; eagerness in favor of a person or cause; ardent and active interest; engagedness; enthusiasm; fervor.
Ambition varnished o'er with zeal.
Zeal, the blind conductor of the will.
Zeal's never-dying fire.
I bear them record that they have a zeal of God, but not according to knowledge.
A zeal for liberty is sometimes an eagerness to subvert with little care what shall be established.
2.
A zealot. [Obsolete] — B. Jonson
Zeal , intransitive verb
To be zealous. [Obsolete & Rare] — Bacon