The quality or state of being fervent; intense, passionate, or zealous feeling or expression.
From Latin 'ferventia', derived from 'fervens' (boiling, burning), which comes from the verb 'fervere' (to boil). The suffix '-ence' became a standard way to form abstract nouns in English.
Fervence is the feeling behind great movements—whether religious revival meetings, revolutionary causes, or artistic movements, that bubbling-over intensity (literally from 'boiling') is what makes people abandon comfort for passion.
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