Idioms
What is an Idiom?
An idiom is a phrase or expression whose meaning cannot be determined from the individual words alone. The phrase has developed a special, figurative meaning through long common usage that is separate from the literal meaning of its words.
For example: It is raining cats and dogs does not mean animals are falling from the sky. It means it is raining very heavily. You must learn idioms as whole units — you cannot decode them word by word.
Key Terms
| Term | Meaning |
|---|---|
| Idiom | A fixed phrase with a non-literal meaning |
| Literal meaning | The exact, word-for-word meaning |
| Figurative meaning | The implied or metaphorical meaning |
| Fixed expression | A phrase whose words cannot easily be changed |
Why Idioms Are Tricky
Idioms are non-literal, which means you must learn them through exposure rather than by analysing the words. This can be confusing for learners of English as an additional language. Even fluent speakers sometimes misuse idioms by changing the wording slightly, which can make the phrase sound unnatural.
Idioms also change over time — some become outdated while new ones emerge from popular culture.
Common English Idioms
| Idiom | Meaning |
|---|---|
| Break a leg | Good luck |
| Hit the nail on the head | Be exactly right |
| Under the weather | Feeling ill or unwell |
| Cost an arm and a leg | Very expensive |
| Once in a blue moon | Very rarely |
| Bite the bullet | Endure a difficult situation bravely |
| Spill the beans | Reveal a secret |
| A piece of cake | Something very easy |
| A walk in the park | Something effortless |
| Let the cat out of the bag | Accidentally reveal a secret |
| In the nick of time | Just in time, at the last moment |
| Hit the sack | Go to bed |
| Bite off more than you can chew | Take on more than you can handle |
| The ball is in your court | It is your decision to make |
| Burn bridges | Permanently damage a relationship |
Idioms by Category
Idioms about difficulty:
- Bite the bullet — endure something painful
- Bite off more than you can chew — take on too much
- In hot water — in trouble
Idioms about secrets:
- Spill the beans — reveal a secret
- Let the cat out of the bag — accidentally disclose something
Idioms about time:
- Once in a blue moon — very rarely
- In the nick of time — just barely in time
- Around the clock — all day and all night
Idioms in Writing
Idioms add colour, personality, and naturalness to writing, particularly in:
- Informal or creative writing
- Dialogue between characters
- Personal narratives and journals
However, avoid idioms in formal academic writing, where precise, literal language is expected. In an essay, write "this is a challenging problem" rather than "this is a tough nut to crack."
Worked Examples
Identify the idiom and explain its meaning:
"She studied around the clock before the exam."
- Idiom: around the clock
- Meaning: She studied continuously, all day and all night.
"After the argument, they burned their bridges with their former friends."
- Idiom: burned their bridges
- Meaning: They permanently damaged those relationships, making reconciliation unlikely.
Common Mistakes
- Mixing up similar idioms: "Bite the dust" (to fail or die) is different from "bite the bullet" (to endure difficulty).
- Changing fixed words: Saying "spill the peas" instead of "spill the beans" — idioms are fixed phrases.
- Using idioms in formal writing: They are generally inappropriate in essays and reports.
- Taking idioms literally: Understanding context is essential.
How to Learn Idioms
- Keep a dedicated notebook with the idiom, its meaning, and an example sentence.
- Read widely — novels, newspapers, and scripts are full of natural idiom use.
- Watch films and television shows to hear idioms in real conversational contexts.
- Group idioms by theme (time, difficulty, secrets) to help remember them.
- Practice using new idioms in your own writing immediately after learning them.