B1 Collocation Neutral 2 min read

main problem

Primary or central issue

In 15 Seconds

  • Identifies the most significant obstacle in any given situation.
  • Works in both professional meetings and casual chats with friends.
  • Helps prioritize what needs to be fixed first.

Meaning

This phrase points to the biggest or most important issue in a situation. It is the one thing you need to fix before anything else can get better.

Key Examples

3 of 6
1

Discussing a project at work

The main problem is that we don't have enough budget for marketing.

The main problem is that we don't have enough budget for marketing.

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2

Talking about a broken phone

The main problem is the screen won't turn on, even when charged.

The main problem is the screen won't turn on, even when charged.

<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14.828 14.828a4 4 0 01-5.656 0M9 10h.01M15 10h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>
3

Texting a friend about a party

The main problem with the party is the terrible music!

The main problem with the party is the terrible music!

<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14.828 14.828a4 4 0 01-5.656 0M9 10h.01M15 10h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>
🌍

Cultural Background

Americans value 'getting to the point.' Starting a meeting by identifying the 'main problem' is seen as efficient and proactive. Directly calling something a 'problem' can be seen as too negative. Japanese speakers often use 'kadai' (challenge) to keep the tone positive. The British often use understatement. Instead of 'the main problem,' they might say 'a bit of a snag' or 'a slight issue' even if it's a disaster. Germans appreciate technical precision. When they identify the 'Hauptproblem,' they expect a detailed, logical explanation of why it is the main one.

💡

Use it to lead

In meetings, saying 'The main problem is...' helps you sound like a leader who can prioritize.

⚠️

Don't over-use 'main'

If you say everything is a 'main problem,' nothing is. Pick only one!

In 15 Seconds

  • Identifies the most significant obstacle in any given situation.
  • Works in both professional meetings and casual chats with friends.
  • Helps prioritize what needs to be fixed first.

What It Means

Main problem is your go-to phrase for identifying the heart of a mess. Think of it as the 'boss level' of obstacles. If you have five things going wrong, this is the one causing the most headaches. It is the primary reason why something isn't working. You use it to cut through the noise and focus on the real trouble.

How To Use It

Using it is simple and direct. You usually start a sentence with "The main problem is..." followed by the issue. You can use it for big life choices or small daily annoyances. It works perfectly with verbs like is, remains, or seems to be. It is like pointing a flashlight at the biggest shadow in the room. Just name the problem and you are done.

When To Use It

You can use this almost anywhere. Use it in a meeting to stop people from arguing about small details. Use it with a friend when your car won't start. It is great for texting when you are venting about a bad day. It helps you sound organized and clear-headed. It shows you know exactly what is going wrong.

When NOT To Use It

Don't use it if there are many equal problems. If everything is failing, calling one the main problem might be misleading. Avoid using it for very tiny, insignificant glitches. If your shoelace is untied, it is probably just a 'small issue,' not a main problem. Also, try not to use it to blame people directly in a mean way. It can sound a bit harsh if you say "The main problem is you."

Cultural Background

In English-speaking cultures, people value 'getting to the point.' We like to identify the 'root cause' quickly. Using main problem shows you are a problem-solver. It reflects a culture that prefers efficiency over long, vague explanations. It is a very 'Western' way of looking at challenges. We like to isolate the big beast and tackle it first.

Common Variations

You might also hear people say the biggest issue or the primary concern. Some might use the idiom the elephant in the room if the problem is obvious but ignored. In business, you might hear the pain point. However, main problem is the most common and easiest to understand. It is the classic choice for a reason.

Usage Notes

This phrase is very safe to use in almost any context. It is grammatically simple and widely understood across all English dialects.

💡

Use it to lead

In meetings, saying 'The main problem is...' helps you sound like a leader who can prioritize.

⚠️

Don't over-use 'main'

If you say everything is a 'main problem,' nothing is. Pick only one!

🎯

The 'That' Clause

Pair it with 'is that' to sound more fluent: 'The main problem is that we're late.'

💬

Soften it if needed

If you're worried about being too blunt, say 'One of the main problems...' instead.

Examples

6
#1 Discussing a project at work
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 13.255A23.931 23.931 0 0112 15c-3.183 0-6.22-.62-9-1.745M16 6V4a2 2 0 00-2-2h-4a2 2 0 00-2 2v2m4 6h.01M5 20h14a2 2 0 002-2V8a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z"/></svg>

The main problem is that we don't have enough budget for marketing.

The main problem is that we don't have enough budget for marketing.

Identifies a resource gap in a professional setting.

#2 Talking about a broken phone
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14.828 14.828a4 4 0 01-5.656 0M9 10h.01M15 10h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>

The main problem is the screen won't turn on, even when charged.

The main problem is the screen won't turn on, even when charged.

Focuses on the primary technical failure.

#3 Texting a friend about a party
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14.828 14.828a4 4 0 01-5.656 0M9 10h.01M15 10h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>

The main problem with the party is the terrible music!

The main problem with the party is the terrible music!

Expresses a personal opinion about a social event.

#4 A humorous complaint about dieting
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14.828 14.828a4 4 0 01-5.656 0M9 10h.01M15 10h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>

The main problem with my diet is that pizza exists.

The main problem with my diet is that pizza exists.

Uses the phrase for a lighthearted, relatable joke.

#5 Discussing a relationship issue
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4.318 6.318a4.5 4.5 0 000 6.364L12 20.364l7.682-7.682a4.5 4.5 0 00-6.364-6.364L12 7.636l-1.318-1.318a4.5 4.5 0 00-6.364 0z"/></svg>

I feel like the main problem is that we stopped talking to each other.

I feel like the main problem is that we stopped talking to each other.

Addresses a serious emotional hurdle.

#6 Explaining a delay
<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M14.828 14.828a4 4 0 01-5.656 0M9 10h.01M15 10h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>

The main problem was the heavy traffic on the highway.

The main problem was the heavy traffic on the highway.

Provides a clear reason for being late.

Test Yourself

Complete the sentence with the correct words.

The ______ ______ with the new car is that it uses too much petrol.

✓ Correct! ✗ Not quite. Correct answer: main problem

We use the adjective 'main' with the noun 'problem.'

Which sentence is the most natural for a business meeting?

How should you introduce the biggest challenge in a project?

✓ Correct! ✗ Not quite. Correct answer: The main problem is the deadline.

'The main problem' is the standard way to identify a specific primary issue.

Fill in the missing line in the dialogue.

A: I can't get this software to work. B: ____________________?

✓ Correct! ✗ Not quite. Correct answer: What is the main problem you're having

This is a standard way to ask for a specific description of a tech issue.

Match the phrase variation to the correct register.

Match 'Primary concern' and 'Biggest headache'.

✓ Correct! ✗ Not quite. Correct answer: Formal/Informal

'Primary concern' is formal; 'Biggest headache' is informal.

🎉 Score: /4

Visual Learning Aids

Types of Problems

🚩

Main

  • The #1 priority
  • The root cause
  • Must fix first
🔹

Minor

  • Small annoyance
  • Can wait
  • Easy to fix
⚠️

Major

  • Big impact
  • Serious
  • Could be several

Practice Bank

4 exercises
Complete the sentence with the correct words. Fill Blank A2

The ______ ______ with the new car is that it uses too much petrol.

✓ Correct! ✗ Not quite. Correct answer: main problem

We use the adjective 'main' with the noun 'problem.'

Which sentence is the most natural for a business meeting? Choose B1

How should you introduce the biggest challenge in a project?

✓ Correct! ✗ Not quite. Correct answer: The main problem is the deadline.

'The main problem' is the standard way to identify a specific primary issue.

Fill in the missing line in the dialogue. dialogue_completion B1

A: I can't get this software to work. B: ____________________?

✓ Correct! ✗ Not quite. Correct answer: What is the main problem you're having

This is a standard way to ask for a specific description of a tech issue.

Match the phrase variation to the correct register. situation_matching B2

Match 'Primary concern' and 'Biggest headache'.

✓ Correct! ✗ Not quite. Correct answer: Formal/Informal

'Primary concern' is formal; 'Biggest headache' is informal.

🎉 Score: /4

Frequently Asked Questions

12 questions

No, 'main' is already the top level. Just say 'the main problem.'

'Main' is the primary one (usually only one). 'Major' just means big (there can be many).

Yes, it is perfectly acceptable, though 'primary challenge' sounds slightly more academic.

'With' is much more common: 'The main problem with the car.'

Yes, but it's very blunt. 'He is the main problem' means he is the cause of all the trouble.

Yes, it identifies a difficulty, but identifying it is the first step to a positive solution.

You can say 'the big thing' or 'the biggest issue.'

Technically no, but you can say 'The two main problems are...' if they are equally important.

Yes, it is used globally across all varieties of English.

There isn't a direct opposite, but you could say 'the main advantage' or 'a minor issue.'

Yes, but it might sound a bit dramatic. 'The main problem with this pen is the color.'

Use 'problem' for one, and 'problems' if you are listing the top few.

Related Phrases

🔄

primary concern

synonym

The most important thing to worry about.

🔗

root cause

specialized form

The original problem that caused all other problems.

🔗

major obstacle

similar

A big thing standing in your way.

🔗

deal-breaker

specialized form

A problem so big it stops a deal or relationship.

🔗

the heart of the matter

idiomatic

The most central part of a situation.

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