SHAMPOO

I. transitive verb Etymology: Hindi & Urdu cẵpo, imperative of cẵpnā to press, massage Date: 1762 massage , 2. to wash (as the hair) with soap and water or with a special preparation, to wash the hair of, ~er noun II. noun (plural ~s) Date: 1838 an act or instance of ~ing, a preparation used in ~ing