əˈsɪdɪti əˈsɪdʒʊ.leɪt ˈdʊə ˈdʊɹ fɔls fəˈmɛnt fɚˈmɛnt ˈmuːdi məˈɹəʊs mɒˈɹoʊs ɒf ɔf ˈɹænsɪd ˈsætənaɪn ˈsætɚˌnaɪn ˈsaʊ(ə)ɹ ˈsaʊə ˈsaʊ(ə)ɹ ˈsaʊə ˈsaʊ(ə)ɹ ˈsaʊə ˈsʌlən go sour or spoil The milk has soured The wine worked The cream has turned — we have to throw it out smelling of fermentation or staleness showing a brooding ill humor a dark scowl the proverbially dour New England Puritan a glum, hopeless shrug he sat in moody silence a morose and unsociable manner a saturnine, almost misanthropic young genius a sour temper a sullen crowd inaccurate in pitch a false (or sour) note her singing was off key make sour or more sour having a sharp biting taste in an unpalatable state sour milk one of the four basic taste sensations; like the taste of vinegar or lemons the property of being acidic the taste experience when vinegar or lemon juice is taken into the mouth a cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar