from 2204; 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):

KJV-- emulation, envy (-ing), fervent mind, indignation, jealousy, zeal.

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2204 zeo (dzeh'-o);

a primary verb; to be hot (boil, of liquids; or glow, of solids), i.e. (figuratively) be fervid (earnest):

KJV-- be fervent.

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