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
keel over
Grammar usage guide and real-world examplesUSAGE SUMMARY
"keel over" is correct and usable in English.
You can use it when you want to refer to someone suddenly collapsing or falling over, often after feeling overwhelmed or faint. For example: "As soon as the teacher started scolding the student, she keeled over."
✓ Grammatically correct
News & Media
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
38 human-written examples
You keel over again and knock your head, I'm in real trouble".
News & Media
Esquire magazine, a monument to male vitality, seemed about to keel over in 2009.
News & Media
The first sector to keel over was residential construction, as demand for new homes dried up.
News & Media
In the seconds before the boat began to keel over, he leapt into the merchant ship.
News & Media
I learned from them that you just can't keel over and give in".
News & Media
"I'm going to say, 'Motion denied,' and then keel over," he predicted.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
21 human-written examples
Lehman keeled over?
News & Media
"I nearly keeled over," Garner said.
News & Media
"I feel incapacitated," he insists, then keels over again.
News & Media
Dumbledore keeled over right in middle of Gryffindor turkeygriff buffet.
News & Media
"In the past, you got sick and you keeled over and died," he said.
News & Media
Expert writing Tips
Best practice
Use "keel over" to vividly describe a sudden and unexpected collapse, whether physical or metaphorical. It adds a sense of abruptness to your writing.
Common error
Avoid using "keel over" solely in contexts of physical fainting or collapse. While accurate, the phrase is powerful for describing sudden failures or downfalls. For instance, a business deal can "keel over" due to unforeseen circumstances.
Source & Trust
93%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrasal verb "keel over" functions as an intransitive verb, indicating an action performed by a subject without acting upon a direct object. As Ludwig AI confirms, it signifies a sudden collapse or failure. Examples show its use in both literal and figurative contexts.
Frequent in
News & Media
87%
Science
3%
Wiki
3%
Less common in
Formal & Business
2%
Academia
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "keel over" is a phrasal verb that commonly describes a sudden collapse or failure. Ludwig AI confirms its grammatical correctness and applicability in various contexts. Predominantly found in News & Media sources, the phrase offers a vivid way to describe abrupt events, whether literal or figurative. While versatile, be mindful of the level of formality required by the context. Alternatives like ""collapse"" or ""faint"" can be used when a more formal tone is needed. Remember that "keel over" is a great way to dramatically emphasize that something abrupt and unexpected happened.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
collapse
General term for suddenly falling down or failing.
faint
Specifically refers to losing consciousness briefly.
pass out
Informal term for losing consciousness.
black out
Sudden loss of consciousness or awareness.
give way
Suggests a structural failure or yielding under pressure.
succumb
Implies yielding to an illness, temptation, or other negative force.
bite the dust
Idiomatic expression for dying or failing.
go under
Implies financial failure or sinking.
founder
Describes a ship sinking or a plan failing.
meet one's end
Euphemistic way to say someone died.
FAQs
How to use "keel over" in a sentence?
You can use "keel over" to describe someone collapsing or something suddenly failing. For example, "He was so shocked he almost keeled over" or "The project keeled over due to lack of funding".
What does "keel over" mean?
"Keel over" has two main meanings: one, for a vessel to capsize; and two, for a person to collapse or faint. It can also be used figuratively to describe something failing suddenly.
What can I say instead of "keel over"?
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
93%
Authority and reliability
4.6/5
Expert rating
Real-world application tested