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1425–75; (noun) late Middle English: sweat bath, heated room, probably < Middle Dutch, Middle Low German, cognate with Old English stofa, stofu heated room for bathing, Old High German stuba ( German Stube room; bierstube ), Old Norse stofa; early Germanic borrowing < Vulgar Latin *extupa, *����ū�貹 (> French é�ٳܱ��� sweat room of a bath; stew ¹ ), noun derivative of *����ū�������, *����ū������� to fill with vapor, equivalent to Latin ex- ex- ¹ + Vulgar Latin *-��ū������� < Greek �ٲ�̄́���𾱲� to raise smoke, smoke, akin to ��ŷ���Dz� fever ( typhus ); alternatively explained as a native Germanic base, borrowed into Romance ( izba ); (v.) late Middle English stoven to subject to hot-air bath, derivative of the noun