1373, from L. februarius mensis "month of purification," from februa "purifications" (plural of februum), of unknown origin, said to be a Sabine word. The last month of the ancient (pre-450 BC) Roman calendar, so named in reference to the Roman feast of purification, held on the ides of the month. In Britain, replaced O.E. solmonað "mud month." English first (c.1200) borrowed it from O.Fr. Feverier, which yielded feoverel before a respelling to conform to Latin.