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let down

A2 neutral separable transitive
In simple words

To make someone sad or disappointed by not doing what you promised, or to move something slowly downward.

Literal meaning: To lower something or someone down from a height.

Meanings

1 A2 idiomatic neutral

To fail to do what someone expected, hoped for, or relied on you to do, causing disappointment.

"I promised I'd be there, and I don't want to let you down."

"You have never let me down."

— Queen Elizabeth II, addressing the British public during a wartime anniversary broadcast, BBC, 1997
Grammar: separable
2 B1 neutral

To lower something slowly or gradually from a higher to a lower position.

"They let down a rope ladder from the helicopter."

Grammar: separable
3 B1 neutral

To allow air to escape from a tyre, making it flat.

"Someone had let down all four of his tyres overnight."

Grammar: separable
4 B2 neutral

(Sewing) To extend a garment's hem so it hangs lower.

"She let down the hem of her daughter's school skirt at the start of term."

Grammar: separable
Usage notes

The sense of disappointing someone is extremely common. Often used with 'feel' in the passive: 'I felt let down.' The noun 'letdown' (one word) means a disappointment. The sewing sense (lengthening a hem) is more specific.

Commonly used with

team friends family promise expectations hair

Forms

Base
let down
I/you/we/they
3rd person
lets down
he/she/it
Past simple
let down
yesterday
Past participle
let down
have + pp
-ing form
letting down
continuous

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Synonyms

disappoint fail disillusion lower deflate frustrate

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