Tra từ sour - Từ điển Oxford Advanced Learner 8th

sour [sour sours soured souring sourer sourest] adjective, verb BrE [ˈsaʊə(r)] NAmE [ˈsaʊər]
adjective
1. having a taste like that of a lemon or of fruit that is not ready to eat
•sour apples
•a sour flavour
Opp: ↑sweet
see also ↑sweet-and-sour
2. (especially of milk)having an unpleasant taste or smell because it is not fresh
•to turn/go sour
•a sour smell
3. (of people)not cheerful; bad-tempered and unpleasant
•a sour and disillusioned woman
•a sour face
• The meeting ended on a sour note with several people walking out.

Word Origin:
Old English sūr, of Germanic origin; related to Dutch zuur and German sauer.

Thesaurus:
sour adj.
1.
•The wine tasted sour.
sharp • • acid • • bitter • • pungent • • acrid •
Opp: sweet
a/an sour/sharp/acid/bitter/pungent/acrid taste/flavour/smell/odour
a/an sour/sharp/acid/bitter fruit
taste sour/sharp/bitter
Which word? A bitter taste is usually unpleasant, but some people enjoy the bitter flavour of coffee or chocolate; no other word can describe this flavour. A sharp or pungent flavour is more strong than unpleasant, especially when describing cheese. Sharp, sour and acid all describe the taste of a lemon or a fruit that is not ripe. An acrid smell is strong and unpleasant, especially the smell of smoke or burning, but not the smell of food.
2.
•The milk had turned sour.
bad • • rancid • • rotten • • stale • |BrE off • • mouldy • |AmE moldy •
Opp: fresh
go sour/bad/rancid/rotten/stale/off

Synonyms:
bitter
pungent • sour • acrid • sharp • acid
These words all describe a strong, unpleasant taste or smell.
bitter • (of a taste or smell) strong and usually unpleasant; (of food or drink) having a bitter taste.
pungent • (of a smell or taste) strong and usually unpleasant; (of food or smoke) having a pungent smell or taste: ▪ the pungent smell of burning rubber
sour • (of a taste) bitter like the taste of a lemon or of fruit that is not ripe; (of food or drink) having a sour taste: ▪ Too much pulp produces a sour wine.
acrid • (of a smell or taste) strong and unpleasant; (of smoke) having an acrid smell: ▪ acrid smoke from burning tyres
sharp • (of a taste or smell) strong and slightly bitter; (of food or drink) having a sharp taste: ▪ The cheese has a distinctively sharp taste.
acid • (of a taste or smell) bitter, like the taste of a lemon or of fruit that is not ripe; (of food or drink) having an acid taste.
which word?
A bitter taste is usually unpleasant, but some people enjoy the bitter flavour of coffee or chocolate. No other word can describe this flavour. A sharp or pungent flavour is more strong than unpleasant, especially when describing cheese. Sharp, sour and acid all describe the taste of a lemon or a fruit that is not ripe. An acrid smell is strong and unpleasant, especially the smell of smoke or burning, but not the smell of food.
a(n) bitter/pungent/sour/acrid/sharp/acid taste/flavour
a(n) bitter/pungent/acrid/sharp/acid smell/odour
a(n) bitter/sour/sharp/acid fruit
pungent/sharp cheese
pungent/acrid smoke

Example Bank:
•The milk smelled sour.
•The sauce tasted very sour.
•The whole experience has really left a sour taste in my mouth.
•Their friendship has turned a little sour.
•Their relationship quickly turned sour.
•As time went by the marriage turned sour.
•Chinese sweet-and-sour pork
•He smelled a sour whiff on the old man's breath.
•She smelled the slightly sour smell of beer on his breath.
•She was a sour and disillusioned old woman.
•The milk had turned sour.
•Too much pulp produces a sour wine.
Idioms: ↑go sour ▪ ↑sour grapes
Derived Words: ↑sourly ▪ ↑sourness

verb
1. intransitive, transitive (of relationships, attitudes, people, etc.)to change so that they become less pleasant or friendly than before; to make sth do this
•The atmosphere at the house soured.
•~ sth The disagreement over trade tariffs has soured relations between the two countries.
2. intransitive, transitive ~ (sth) if milk sours or if sth sours it, it becomes sour and has an unpleasant taste or smell
Verb forms:

Word Origin:
Old English sūr, of Germanic origin; related to Dutch zuur and German sauer.

Example Bank:
•During rehearsals his tantrums soured the atmosphere.
•The atmosphere in the house had soured.
•The disagreement over trade tariffs soured relations between the two countries.
•The joy over the win was soured by an injury to the captain.
•They were middle-aged men soured by failure.