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
are deficient
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are deficient" is correct and usable in written English.
It can be used to describe a lack or insufficiency in something, often in a formal or academic context. Example: "The results of the study indicate that the current resources are deficient in meeting the needs of the community."
✓ Grammatically correct
News & Media
Science
Alternative expressions(6)
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
These protections are deficient for H-1B workers.
News & Media
"Many people are deficient in vitamin D," said Prof Garland.
News & Media
He believes that those who are deficient in empathy can be taught.
News & Media
You are deficient in it to the tune of one".
News & Media
I'm not criticizing our league, but a lot of players that come in now are deficient fundamentally.
News & Media
Compare your nutritional intake to the U.S.D.A. recommended daily allowances to see if you are deficient in any areas.
News & Media
It is not that the superstitions of former days are deficient in terrific interest, or even in poetical beauty.
News & Media
Such children are recurrent figures in Godden's work; they are vulnerable, observant individuals who are deficient in charm but gifted with perception beyond their years.
News & Media
He and Mr. Safir remain committed to policies that push cops who are deficient in judgment, training and supervision into situations they are not prepared to handle.
News & Media
"It's not that these crop plants are deficient in any way," said Dr. Maris Apse, a postdoctoral researcher in Dr. Blumwald's laboratory.
News & Media
There is no dearth of possibilities, after all: as a species we are deficient in many ways, but we have a talent for atrocity.
News & Media
Expert writing Tips
Best practice
When using "are deficient", clearly specify what the subject is lacking and the context of the deficiency. This provides clarity and avoids ambiguity. For example, "The soil is deficient in nitrogen," is more informative than simply, "The soil is deficient".
Common error
Avoid using "are deficient" without specifying what is lacking. Saying something "is deficient" without context leaves the reader wondering what the deficiency pertains to. Always provide specific details to ensure clarity.
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are deficient" functions as a predicate adjective, describing the state of a subject as lacking something essential or adequate. Ludwig examples confirm its adjectival role, indicating a condition of insufficiency.
Frequent in
Science
40%
News & Media
40%
Formal & Business
20%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "are deficient" is a grammatically sound and frequently used way to describe a lack or inadequacy. Ludwig AI analysis confirms that it functions as a predicate adjective, commonly appearing in science, news and media, and formal business contexts. While generally neutral, the register can lean towards formal depending on the source. When using the phrase, ensure you clearly specify what is lacking to avoid ambiguity. Alternative phrases include "are lacking" and "are insufficient".
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
are lacking
Emphasizes the absence of something needed.
are inadequate
Highlights the insufficiency to meet a specific requirement or standard.
are insufficient
Similar to inadequate, but often refers to a quantity or amount.
are wanting
Indicates something is missing or not up to par.
are subpar
Suggests performance or quality is below the expected level.
are inferior
Highlights that something is of lower quality or status.
are not enough
Directly states that the quantity or quality is not sufficient.
fall short
Implies a failure to reach a desired goal or standard.
do not measure up
Indicates a failure to meet expectations or requirements.
are found wanting
Suggests that something has been assessed and deemed inadequate.
FAQs
How can I use "are deficient" in a sentence?
The phrase "are deficient" is used to indicate a lack or insufficiency in something. For example, "The current resources "are deficient" in meeting the community's needs."
What can I say instead of "are deficient"?
You can use alternatives like "are lacking", "are inadequate", or "are insufficient" depending on the context.
Which is correct, "are deficient" or "is deficient"?
"Are deficient" is used with plural subjects, while "is deficient" is used with singular subjects. For example, "The systems "are deficient"," but "The system is deficient."
What's the difference between "are deficient" and "are inadequate"?
While both indicate a lack, "are deficient" often implies a more fundamental lack of something essential, whereas "are inadequate" suggests a failure to meet a specific standard or requirement. The nuance depends on the context.
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
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested