Open English Wordnet
Nouns
(n)soura cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar Verbs
(v)sour, turn, ferment, workgo sour or spoil“The milk has soured”,
“The wine worked”,
“The cream has turned — we have to throw it out” Adjectives
(s)sour, rancidsmelling of fermentation or staleness (a)sourhaving a sharp biting taste (s)sourone of the four basic taste sensations; like the taste of vinegar or lemons (s)false, off-key, sourinaccurate in pitch“a false (or sour) note”,
“her singing was off key” (s)dark, dour, glowering, glum, moody, morose, saturnine, sour, sullenshowing 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” (Bruce Bliven),
“a sour temper”,
“a sullen crowd”