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Shampoo is a preparation used for washing hair, derived from Hindi and Urdu words meaning "to press" or "massage." Initially, in the 18th century, "shampoo" referred to the act of massage itself. By the mid-19th century, its meaning evolved in English to encompass washing the hair with soap or a specialized product. The word's roots trace back to Sanskrit, relating to caressing, soothing, or kneading.1234

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