Let sb down Meaning, Examples & How to Use in English

What Does “Let sb down” Mean?

“Let sb down” means to disappoint someone by failing to do what they expected or needed you to do.

Introduction

The phrase “let sb down” is a common phrasal verb used in everyday English. It expresses the feeling of disappointment caused when someone does not meet your expectations or fails to support you when needed. Understanding the “let sb down meaning” helps learners communicate emotions related to trust and reliability. This phrase is often used in personal and professional contexts to describe situations where someone feels betrayed or neglected. Knowing how to use “let sb down” correctly can improve your conversational skills and help you express yourself more naturally.

Quick Info Box

• Phrasal verb: let somebody down
• Type: transitive
• Level: B1 (Intermediate)
• Meaning: to disappoint someone by failing to do what they expect

Structure (Grammar Rules)

“Let sb down” is a separable phrasal verb because you can place the object between “let” and “down.”

• Subject + let + object + down
• Example: She let me down.
• Or you can say: She let down her friends.

Note: You cannot separate “let down” without an object. You always need to specify who you let down.

How to Use “Let sb down”?

You use “let sb down” when you want to talk about disappointing someone. It often involves situations where someone expected help, support, or a promise to be kept but was left feeling sad or frustrated instead. It can be used in formal and informal situations.

Examples include letting down a friend by not attending their party or letting down your team by not performing well in a game.

Examples

Imagine your friend trusted you to keep a secret, but you told others. You would have let your friend down.

• He promised to help me move, but he let me down at the last minute.
• Don’t let your parents down by skipping your exams.
• She felt let down when her colleague didn’t support her during the meeting.
• Let me down in a sentence: “I know I let you down, and I’m sorry.”

Common Mistakes

Many learners confuse the structure or use “let down” without an object, which is incorrect.

• Incorrect: I let down yesterday.
• Correct: I let my team down yesterday.
• Incorrect: She let down.
• Correct: She let her friends down.

Remember, always include the person or people you let down.

Differences / Synonyms

There are several phrasal verbs similar to “let sb down,” but they have different meanings.

• Disappoint sb: A more general term that can be used in many contexts.
• Fail sb: Often used in academic or performance contexts.
• Break sb’s heart: A stronger emotional phrase, usually about romantic disappointment.

“Let sb down” specifically focuses on disappointment caused by unmet expectations or failure to support.

Common Collocations

When using “let sb down,” certain objects appear frequently. These collocations help you sound more natural.

• Let a friend down: disappoint a close person
• Let your family down: fail to meet family expectations
• Let the team down: fail to support a group effort
• Let someone down badly: cause strong disappointment
• Never let sb down: always be reliable

Related Phrasal Verbs

Here are related phrasal verbs of let sb down:

• Let Sb Past
• Let Yourself Into Sth
• Let Sb Out Of Sth
• Let Sth Off
• Let Sb Out

Real-life Dialogue

Here is a short conversation using “let sb down”:

Anna: I’m sorry I didn’t come to your party last night.

Ben: It’s okay, but you really let me down. I was counting on you.

Anna: I understand. I won’t let you down again.

Practice

Try to complete the sentences with the correct form of “let sb down”:

• 1. I promised to help my sister, but I __________ her __________.
• 2. Don’t __________ your team __________ before the big match.
• 3. She felt __________ down when her friends forgot her birthday.

FAQs

• Q: Can I use “let down” without an object? A: No, “let down” needs an object (someone) to be correct.
• Q: Is “let sb down” formal or informal? A: It is used in both formal and informal contexts.
• Q: What is the opposite of “let sb down”? A: The opposite is “support” or “not disappoint.”
• Q: Can “let sb down” be used about things? A: No, it is used only for people (someone you disappoint).
• Q: How do you pronounce “let sb down”? A: It is pronounced as /lɛt sʌmbədi daʊn/.