having a sharp taste (like that of vinegar, a lemon or unripe fruit)
having the taste of fermentation
having or showing a bad temper; disagreeable in manner
(cause to) become sour or bad
cause to dislike
"a false (or sour) note"
"her singing was off key"
"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"
"The milk has soured"
"The wine worked"
"The cream has turned--we have to throw it out"
No matter how sour and sharp the apples.
出自： E. Hyams
A bowl of milk was souring in the sun.
出自： H. E. Bates
When Dick left the Air Force the marriage soured.