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Take muscle, for example, derived from the Latin musculus, meaning "little mouse." The Romans thought flexing muscles resembled mice scurrying under the skin—a delightful image now forgotten by most. Similarly, salary hides its root in salarium, a reference to salt, once a form of Roman payment. Words like window (vindauga, "wind-eye" in Old Norse) and umbrella (from umbra, Latin for "shade") also preserve ancient nouns, their original meanings obscured by time and usage.