malmsey (n.) Look up malmsey at Dictionary.com
c.1400, type of strong, sweet white wine, from Provençal malmesie or Middle Dutch malemesye, both from Medieval Latin malmasia, from Medieval Greek Monembasia "Monemvasia," a town in the southern Peloponnesus that was an important center of wine production in the Middle Ages, literally "only one entrance," from monos "alone, only" (see mono-) + embasis "entering into," from en- "in" + basis "a going, a stepping, a base" (see basis).