Word Origin & History
mood (1)
"emotional condition, frame of mind," O.E. mod "heart, frame of mind, spirit, courage," from P.Gmc. *motha- (cf. O.Fris. mod "intellect, mind, courage," O.N. moðr "wrath, anger," M.Du. moet, Du. moed, O.H.G. muot, Ger. Mut "courage," Goth. moþs "courage, anger"), of unknown origin. A much more vigorous word in Anglo-Saxon than currently, and used widely in compounds (e.g. modcræftig "intelligent," modful "proud"). Moody is from O.E. modig "brave, proud, high-spirited;" meaning "subject to gloomy spells" is first recorded 1593 (via a M.E. sense of "angry"). To be in the mood "willing (to do something)" is from 1589. First record of mood swings is from 1942.