Fervent describes feelings that are very strong, warm, and intense, especially enthusiasm or belief. A fervent person cares deeply and shows it clearly.
It comes from Latin “fervens” or “fervere,” meaning “to boil” or “to be hot.” The word originally described heat and later shifted to describe emotional heat or passion.
When you say someone has “fervent” beliefs, you’re literally saying their feelings are boiling hot on the inside. Many English words that describe passion—like “fervor”—quietly carry this image of emotional heat.
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