/ ˈmɔːfiːn; NAmE ˈmɔːrf-/ (also old-fashioned mor·phia / ˈmɔːfiə; NAmE ˈmɔːrf-/) noun
[ U ] a powerful drug that is made from opium and used to reduce pain
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WORD ORIGIN
early 19th cent.: from German Morphin , from the name of the Roman god Morpheus . Morpheus is the god of dreams, and in later writings, also the god of sleep.