Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
sour
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "sour" is correct and usable in written English.
It can be used to describe a taste, mood, or situation that is unpleasant or negative. Example: "The milk had gone sour, so I had to throw it away."
✓ Grammatically correct
News & Media
Lifestyle
Sport
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
59 human-written examples
But Zanu-PF has poured scorn on the complaints as sour grapes.
News & Media
Cameron's move added a sour taste to the highly emotional celebrations among supporters of the union after their decisive win in the referendum.
News & Media
4 Serve with some mango chutney or a cooling, sour cream dip to combat the heat of the jerk seasoning.
News & Media
The only sour note of the day came after Alex Salmond, the former Scottish first minister, said that Kennedy's heart had not been in the pro-UK Better Together campaign during last year's independence referendum campaign.
News & Media
In the early 1990s, thousands of American troops withdrew from Somalia in disarray after a badly planned anti-famine intervention went sour.
News & Media
Upstairs, the barman would thoroughly prepare a pisco sour, the national drink, at any time of day.
News & Media
The only sour note for the Tigers was a calf injury to Chris Knights midway through the second quarter.
News & Media
Serves 2 1 tbsp olive oil ½ onion, chopped 1 garlic clove, finely chopped 1 scotch bonnet chilli, deseeded and chopped (leave the seeds in if you like it very hot) 1 tsp tomato puree ½ tsp ground cumin 1 x 400g tin tomatoes 4 eggs 2 tortillas 2 tbsp sour cream 1 Heat the oil in a medium saucepan.
News & Media
This lip-smacking recipe is cut through with sour lime, earthy coriander, garlic and ginger.
News & Media
The last time the American Ballet Theatre performed in Cuba, Fidel Castro had been in power for barely a year and relations between Washington and Havana were yet to turn sour.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
One of my favourite incarnations of Sicily's gutsy seafood: fried fillets of sardines swimming in a glorious sweet-sour sauce of melted onions and Mediterranean herbs.
News & Media
Expert writing Tips
Best practice
When describing flavors, consider the intensity of the taste. Use "tart" for a mildly acidic taste and "sour" for a more intense or unpleasant acidity.
Common error
While "sour" can describe moods or situations, overuse can weaken your writing. Use more precise words like "bitter", "acrimonious", or "disgruntled" for greater impact.
Source & Trust
94%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The word "sour" functions primarily as an adjective, describing the quality of a taste, smell, or even a mood. Ludwig AI confirms this with numerous examples showing its descriptive role, such as "sour milk" or "sour look".
Frequent in
News & Media
40%
Lifestyle
25%
Sport
15%
Less common in
Formal & Business
10%
Travel
5%
Books
5%
Ludwig's WRAP-UP
In summary, "sour" is a versatile word primarily functioning as an adjective to describe unpleasant tastes, smells, moods, or situations. As Ludwig AI highlights, it is grammatically correct and very commonly used, fitting into neutral contexts across various sources such as news, lifestyle, and sports. When choosing synonyms, consider the specific shade of meaning you want to convey, such as "acidic" for taste or "acrimonious" for relationships. Remember, while versatile, overuse in metaphorical contexts can weaken your writing. By being precise and context-aware, you can effectively use "sour" to add depth and clarity to your expression.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
acidic
Refers specifically to the chemical property of being acidic, similar to one aspect of "sour".
tart
Describes a sharp, often pleasant, acidic taste; milder than "sour".
bitter
Indicates a sharp, unpleasant taste, related to "sour" in terms of negative sensory experience.
rancid
Describes a spoiled, bad-tasting, or smelling condition, implying a more extreme form of "sour" in food.
unpleasant
A general term for something disagreeable, which "sour" can often be.
disagreeable
Similar to unpleasant, denoting something not to one's liking.
acrimonious
Describes bitterness and ill-feeling, mirroring the negative connotation of "sour" in relationships or situations.
embittered
Describes someone who is resentful or cynical, similar to the "sour" mood.
turned
Indicates that something has become spoiled or fermented, akin to milk turning sour.
gone bad
A general term for spoilage, relating to the "sour" state of food.
FAQs
How can I use "sour" in a sentence?
You can use "sour" to describe taste (e.g., "The lemon had a sour taste"), emotions (e.g., "He had a sour look on his face"), or situations (e.g., "The deal turned sour").
What is the difference between "sour" and "bitter"?
"Sour" typically refers to an acidic taste, while "bitter" refers to a sharp, pungent taste. Though both are unpleasant, they are distinct sensory experiences.
What can I say instead of "sour"?
Depending on the context, you can use alternatives like "acidic", "tart", "bitter", "rancid" or "acrimonious depending on the specific meaning you want to convey".
Is it correct to say "sour grapes"?
Yes, "sour grapes" is a common idiom referring to the attitude of disparaging something because you cannot have it. It is often used to describe someone who is trying to downplay their disappointment.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
94%
Authority and reliability
4.5/5
Expert rating
Real-world application tested