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
fail to combine
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "fail to combine" is correct and usable in written English.
It can be used when discussing situations where elements do not come together or integrate as intended. Example: "The two components of the project fail to combine effectively, resulting in a lack of cohesion."
✓ Grammatically correct
Science
News & Media
Ecological Economics
Alternative expressions(3)
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
3 human-written examples
While current approaches may effectively tackle some of them, they often fail to combine them together.
Science
Presently, the principal shortcoming compared to maize besides chilling sensitivity during juvenile development is that current sorghum varieties fail to combine a high dry matter yield with adequate dry matter content for silage and satisfying methane yield.
Science
However, if the SAAD is really to reach the goals that have been set, the design of the new benefits must be based on a profound knowledge of how today's middle-aged women combine (or fail to combine) informal caregiving with doing paid work.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
He has failed to combine with the London exchange in the past, while the rival NYSE Group successfully merged with Euronext.
News & Media
They failed to combine, failed to score, and particularly failed in soccer intellect!" Given that Holland's best record at a World Cup finals to this point was played one, lost one, achieved not once but twice in the 1930s, you have to admire the chutzpah.
News & Media
As a result of all this, the women failed to combine forces to resist the first thing the government did that was seen as an attack - the cut in lone parent benefit.
News & Media
But it also announced there would be more cash for development projects in Maoist-dominated areas.The government has so far failed to combine the twin requirements of force and development to produce a successful strategy.
News & Media
For years they have failed to combine, though both seek votes from the same sort of people; neither passed the 5% threshold for representation at the last parliamentary election, four years ago.
News & Media
It is the second time in two years that the telecoms companies have failed to combine and create what would be a mobile-phone behemoth stretching across Africa, South Asia and the Middle East.
News & Media
WASHINGTON — The National Security Agency four months ago intercepted conversations among leaders of Al Qaeda in Yemen discussing a plot to use a Nigerian man for a coming terrorist attack, but American spy agencies later failed to combine the intercepts with other information that might have disrupted last week's attempted airline bombing.
News & Media
To date, rice breeders have generally failed to combine high yields with optimal quality because not all quality traits are defined (Fitzgerald et al. 2009).
Science
Expert writing Tips
Best practice
When using "fail to combine", ensure that the context clearly indicates what elements are not successfully coming together and the consequences of this failure.
Common error
Avoid burying the phrase "fail to combine" within overly complex sentence structures. Keep the sentence clear and concise to emphasize the lack of successful integration. For example, instead of "Despite numerous attempts and careful planning, the intricate pieces of the puzzle, unfortunately, failed to combine", try "The pieces failed to combine despite careful planning."
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "fail to combine" functions as a verb phrase indicating an inability or lack of success in bringing elements together into a unified whole. As Ludwig AI states, it is correct and usable in written English. Examples show its use in diverse contexts.
Frequent in
Science
40%
News & Media
30%
Formal & Business
10%
Less common in
Wiki
5%
Encyclopedias
5%
Ecological Economics
10%
Ludwig's WRAP-UP
In summary, the phrase "fail to combine" is a grammatically sound and usable verb phrase that describes a lack of integration or merging between elements. As Ludwig AI confirms, it is accepted for use in written English. While its frequency is uncommon, it finds use across various contexts, including science, news, and formal writing. When using the phrase, clarity is key: ensure the sentence structure is straightforward and the context clearly identifies the elements that are not successfully coming together.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
do not merge
Focuses on the absence of merging, implying separate entities remain distinct.
do not integrate
Emphasizes the lack of integrated functionality or cohesion.
cannot be unified
Highlights the impossibility of achieving a unified state.
do not coalesce
Stresses the absence of a coming-together or forming a single mass.
fall apart
Suggests a disintegration or failure after an attempted combination.
remain separate
Indicates a continued state of being distinct and unjoined.
do not synthesize
Highlights the lack of synthesis, meaning no new unified entity emerges.
lack synergy
Emphasizes the absence of combined action producing a total effect greater than the sum of individual effects.
don't gel
Informal way of saying things are not working out or coming together well.
prove incompatible
Highlights that elements are unsuitable for combination, with a formal nuance.
FAQs
What does "fail to combine" mean?
The phrase "fail to combine" means that two or more things are unable to come together, merge, or integrate effectively. It implies a lack of cohesion or unity.
How can I use "fail to combine" in a sentence?
You can use "fail to combine" to describe situations where separate elements do not form a cohesive whole. For example: "The two approaches "do not integrate" effectively, causing project delays."
What are some alternatives to "fail to combine"?
Alternatives to "fail to combine" include "do not merge", "do not integrate", or "cannot be unified". The best choice depends on the specific context.
Is it better to say "fail to combine" or "fails to combine"?
Use "fail to combine" when referring to a plural subject or in general statements. Use "fails to combine" when the subject is singular. For example, "The strategies fail to combine" versus "This strategy fails to combine with others."
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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested