Disappoint vs I let you all down

When to use each in English, with meaning, register, and examples.

Disappoint

Top 1,000 (very common)B2verb

I let you all down

Top 3,000 (common)
Most common: Disappoint
 DisappointI let you all down
Pronunciation🇬🇧 /["/ˌdɪsəˈpɔɪnt/","/ˌdɪsəˈpɔɪnts/","/ˌdɪsəˈpɔɪntɪd/","/ˌdɪsəˈpɔɪntɪŋ/"]/🇺🇸 /["/ˌdɪsəˈpɔɪnt/","/ˌdɪsəˈpɔɪnts/","/ˌdɪsəˈpɔɪntɪd/","/ˌdɪsəˈpɔɪntɪŋ/"]/🇬🇧 //aɪ lɛt juː ɔːl daʊn//🇺🇸 //aɪ lɛt juː ɔl daʊn//
MeaningTo make someone feel sad because something is not as good as expected.I disappointed everyone.
ExampleHer decision to cancel the concert is bound to disappoint her fans.After I missed the important meeting, I let you all down.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 3,000 (common)
CEFR levelB2-
Part of speechverb
Collocationsdisappoint someone, disappoint expectations, disappoint a friend, disappoint fans, disappoint inlet down expectations, let down a team, let down friends, let down deeply, let down completely
Antonymsplease, satisfy, delight-
Common mistakesConfused with 'disappointment' as a verb., Using 'disappoint' without an object, e.g., 'He disappointed' instead of 'He disappointed me.'Saying 'let down' instead of 'let you all down' when referring to a group., Using 'let' in a positive context instead of acknowledging disappointment., Confusing 'let down' with other phrases like 'let go' or 'let in'.
Usage notesUse 'disappoint' when expressing feelings of letdown. It's appropriate for both serious and casual situations but avoid using it in overly casual contexts like slang.Use this phrase when expressing regret for not meeting expectations. It's suitable in both personal and professional contexts but avoid in formal writing.

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Disappoint
I let you all down

Frequently asked questions: Disappoint vs I let you all down

What's the difference between Disappoint and I let you all down?

Disappoint: To make someone feel sad because something is not as good as expected. I let you all down: I disappointed everyone.

Which is more common: Disappoint and I let you all down?

Disappoint is the most common in everyday English.

Can you show an example of each?

Disappoint: Her decision to cancel the concert is bound to disappoint her fans. I let you all down: After I missed the important meeting, I let you all down.

Can I use Disappoint and I let you all down interchangeably?

Not always. Disappoint and I let you all down are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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