Rampant describes something that is spreading quickly and is hard to control, especially something bad like disease, crime, or rumors. It can also describe animals in heraldry standing on their back legs.
It comes from Old French “ramper,” meaning “to rear up, climb,” related to the Latin root “ram-” for “branching or climbing.” The image of something rearing up or spreading out led to the idea of uncontrolled growth.
When we say a problem is “rampant,” we’re using a word that once described a rearing animal on a coat of arms, clawing the air. It’s a vivid way of saying the problem isn’t just there—it’s standing up, spreading, and hard to push back down.
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