Ardor

Part of speech: noun (n.)

1. Heat, in a literal sense; as, the ardor of the sun's rays.

2. Warmth or heat of passion or affection; eagerness; zeal; as, he pursues study with ardor; the fought with ardor; martial ardor.

3. Bright and effulgent spirits; seraphim. [Thus used by Milton.]

Synonyms: Fervor; warmth; eagerness. See Fervor.