SOUR

I. adjective Etymology: Middle English, from Old English sūr; akin to Old High German sūr ~, Lithuanian sūrus salty Date: before 12th century causing or characterized by the one of the four basic taste sensations that is produced chiefly by acids , 2. a. having the acid taste or smell of or as if of fermentation ; turned , of or relating to fermentation, smelling or tasting of decay ; rancid , rotten , c. bad , wrong , hostile , disenchanted , 3. unpleasant , distasteful , cross , sullen , not up to the usual, expected, or standard quality or pitch, acid in reaction, containing malodorous sulfur compounds, ~ish adjective ~ly adverb ~ness noun II. noun Date: before 12th century 1. something ~, the primary taste sensation produced by acid stimuli, a cocktail consisting of a liquor (as whiskey), lemon or lime juice, sugar, and sometimes ice, III. verb Date: 14th century intransitive verb to become ~, transitive verb to make ~