An archaic or rare variant term for fervor; intense, passionate feeling or enthusiastic expression.
From Latin 'fervor' (heat, passion) combined with the suffix '-or', though this variant is so rare it may be a historical spelling variation or error that was never standard.
Fervidor is a ghost word—a term that appears in some old texts but was never actually standard English, probably because 'fervor' was already shorter and more euphonious, showing how language naturally selects the most efficient forms.
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