来自古英语 sur,酸的，来自 Proto-Germanic*suraz,酸的，来自 PIE*sur,酸的，酸牛奶，词源同 sauerkraut.引申词义馊的，变味的等。

sour

sour: [OE] Sour is a general Germanic word, with relatives in German sauer, Dutch zuur, and Swedish and Danish sur. Their common ancestor was prehistoric Germanic *sūraz, which was related to Lithuanian sūrus ‘salty’ and Old Church Slavonic syru ‘damp, raw’. Sorrel [14] is etymologically the ‘sour’ plant: its Old French source sorele came ultimately from Germanic *sūraz.
=> sorrel

sour (adj.)

Old English sur "sour, tart, acid, fermented," from Proto-Germanic *sura- "sour" (cognates: Old Norse surr, Middle Dutch suur, Dutch zuur, Old High German sur, German Sauer), from PIE root *suro- "sour, salty, bitter" (cognates: Old Church Slavonic syru, Russian syroi "moist, raw;" Lithuanian suras "salty," suris "cheese").

Meaning "having a peevish disposition" is from early 13c. Sense in whisky sour (1885) is "with lemon added" (1862). Sour cream is attested from 1855. French sur "sour, tart" (12c.) is a Germanic loan-word.

sour (v.)

c. 1300, from sour (adj.). Compare Old High German suren, German säuern. Related: Soured; souring.

1. Their songs are filled with tales of love gone sour.

他们的歌里充斥着变了味的爱情故事。

来自柯林斯例句

2. The barn was filled with the sour-sweet smell of fresh dung.

谷仓里弥漫着新粪酸甜的气味。

来自柯林斯例句

3. Even the European dream is beginning to turn sour.

甚至连欧洲之梦都开始破灭了。

来自柯林斯例句

4. She made a sour face in his direction.

她冲他阴沉着脸。

来自柯林斯例句

5. Everything turned sour for me there.

在那里，对我来说一切变得很不顺利。

来自柯林斯例句