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
let him down
Grammar usage guide and real-world examplesUSAGE SUMMARY
"let him down" is a commonly used phrase in written English.
It means to disappoint or fail someone. Example: John promised to help his friend move, but he let him down by not showing up on the day of the move.
✓ Grammatically correct
News & Media
Wiki
Alternative expressions(1)
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
"Bona's let him down".
News & Media
I let him down".
News & Media
The opposition, he added, "let him down".
News & Media
"Who would let him down?
News & Media
We can't let him down".
News & Media
I can't let him down".
News & Media
How could you let him down?
News & Media
How could I let him down?
News & Media
I've let him down, on both counts".
News & Media
How can I let him down gently?
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
They always let him down.
News & Media
Expert writing Tips
Best practice
When using "let him down", consider the emotional impact on the person being let down. Choose alternative phrasing if a softer approach is needed, such as using "disappoint" instead of "let down" in certain contexts.
Common error
Ensure the subject truly has the agency to "let him down". Avoid saying "the weather let him down" when you mean "the weather thwarted his plans".
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "let him down" functions as a phrasal verb, where "let down" is the verb and "him" is the object. It describes the action of disappointing or failing someone. Ludwig confirms this is a very common phrase in English.
Frequent in
News & Media
75%
Wiki
15%
Formal & Business
5%
Less common in
Science
2%
Academia
1%
Reference
2%
Ludwig's WRAP-UP
In summary, "let him down" is a common phrasal verb used to express the act of disappointing or failing someone. As confirmed by Ludwig, the phrase is considered grammatically correct and is used across different contexts such as news, media and general communications. When writing, consider the emotional impact, and also, the context in order to select the most appropriate synonym if necessary. Remember to avoid misattributing agency to inanimate objects. Ludwig can assist in finding examples to further understand the proper usage.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
disappoint him
Directly conveys the act of causing disappointment.
fail him
Emphasizes a lack of success in meeting his expectations.
be a letdown to him
Uses "letdown" as a noun to describe the act of disappointing someone.
betray his trust
Highlights a breach of confidence or loyalty.
fall short of his expectations
Focuses on not reaching the level he anticipated.
not live up to his expectations
Similar to falling short, but emphasizes a continued failure.
leave him wanting
Indicates a sense of unfulfillment or dissatisfaction.
not measure up
Implies inadequacy in meeting a standard.
dash his hopes
Suggests a sudden and forceful destruction of optimism.
prove a disappointment
Highlights the outcome of causing someone disappointment.
FAQs
How can I rephrase "let him down" to sound more formal?
In more formal contexts, consider using phrases like "disappoint him", "fail to meet his expectations", or "betray his trust" to replace "let him down".
What's the difference between "disappoint him" and "let him down"?
"Disappoint him" is a more general term, while "let him down" often implies a prior expectation or promise that was not fulfilled. "Let down" suggests a greater degree of personal failure.
Is it always negative to say someone "let him down"?
Yes, the phrase "let him down" carries a negative connotation as it implies a failure to meet expectations or a disappointment.
What are some gentle ways to say that someone "let him down"?
Instead of saying "let him down", you might say they "didn't quite meet his expectations", "fell short of what he hoped for", or "weren't able to deliver as planned". These soften the blow.
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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested