12 Idioms and Expressions Related to Knowledge

Hello English learners! Welcome to a new lesson. In this lesson, we will explore idioms and expressions related to knowledge in English, with clear meanings, useful examples, and common phrases connected with learning, understanding, and experience.

Have you ever heard someone say show someone the ropes or pick someone’s brain and wondered what it really meant? English is full of idioms and expressions connected with knowledge, learning, understanding, and experience, and they can make your English sound much more natural and expressive.

In today’s lesson, we’re going to look at 12 idioms and expressions related to knowledge, explain what they mean, and see how to use them in context.

1. Common knowledge

Something is common knowledge if many people know it. It is widely known and generally accepted.

• It’s common knowledge that Betty has a drinking problem, although nobody talks about it openly.
• It’s common knowledge that a healthy diet is important for both body and mind.

2. Working knowledge

If you have a working knowledge of something, you know enough about it to use it in practice, even if you are not an expert.

• You need a working knowledge of Microsoft Word and Excel for this position.
• Sofia speaks English fluently and has a working knowledge of German and Spanish.

This expression is especially common in job advertisements and CVs.

3. To the best of my knowledge / To my knowledge

We use to the best of my knowledge or to my knowledge when we say what we believe to be true, based on what we know.

• To the best of my knowledge, this is the first time anyone from our school has received this award.
• Adriana has never been to Italy, to my knowledge.

These expressions are useful when you want to sound careful and precise.

4. As far as I know

This expression has a similar meaning. We use it when we are giving information that we believe is true, although we may not know every detail.

• As far as I know, it isn’t going to rain this week.
• The tenants haven’t paid this month’s rent yet, as far as I know.

It is a very common phrase in both spoken and written English.

5. Know the ropes

If you know the ropes, you know how a job, system, or activity works because you have experience.

• Julia has been a secretary for ten years, so she really knows the ropes.
• When Paul started work as a buyer for that department store, he didn’t know the ropes, but he learned quickly.

You can also show someone the ropes, which means to teach them how things are done.

• On my first day at work, my manager showed me the ropes.

6. A thirst for knowledge

A thirst for knowledge means a very strong desire to learn and understand new things.

• Mary has had a thirst for knowledge ever since she learned to read.
• Despite his difficulties at school, Robert had an unquenchable thirst for knowledge.

This is a lovely expression because it suggests real curiosity and love of learning.

7. Pick someone’s brain

If you pick someone’s brain, you ask them for ideas, information, or advice because they know more about something than you do.

• Brian, could I pick your brain about the new photocopier?
• May I pick your brain about houseplants? Yours always look so healthy.

This expression is informal and very useful in everyday conversation.

8. Great minds think alike

We say great minds think alike when two people have the same idea or opinion.

• “I was just about to suggest going by train.” “Great minds think alike!”
• We both chose the same topic for our presentation — great minds think alike.

It is often used humorously and in a friendly way.

9. Get something under your belt

If you get something under your belt, you gain experience, skill, or an achievement.

• Once you get a few lessons under your belt, driving becomes much easier.
• She already has several years of teaching experience under her belt.

This expression is often used for experience that helps you feel more confident.

10. Get your head around something

If you get your head around something, you manage to understand something difficult or complicated. It is often used in the negative form.

• I’ve been trying all afternoon, but I just can’t get my head around this maths problem.
• Have you managed to get your head around the new tax law yet?

This is a very common and useful idiom, especially when talking about complex ideas.

11. Knowledge is power

This well-known saying means that the more you know, the stronger and more capable you become.

• A good education opens many doors because knowledge is power.
• In the modern world, information is everywhere, and knowledge is power.

Simple, old-fashioned, and still true. Some sayings endure because they deserve to.

12. Two heads are better than one

This expression means that two people thinking together can solve a problem more easily than one person working alone.

• Let’s look at the report together — two heads are better than one.
• When problems arise at work, two heads are usually better than one.

It is a useful expression for teamwork, cooperation, and problem-solving.

Final thoughts

Learning idioms and expressions related to knowledge can help you sound more natural, confident, and fluent in English. These phrases are especially useful because they often appear in everyday conversations, workplace English, and exam writing.

Try not just to memorise them, but to use them in your own sentences. That is how vocabulary moves from your notebook into your real English.

After all, knowledge is power — and when it comes to learning English, a little extra knowledge goes a very long way.

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