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KitWren
c1C1 Advanced EnglishNuanced vocabularyVocabularyabout 18 min

Idioms and fixed expressions

Use C1 idioms and fixed expressions naturally: a double-edged sword, the tip of the iceberg, by and large, to all intents and purposes.

In this lesson you will

  • Understand and use higher-level idioms
  • Use fixed expressions and binomials
  • Match idioms to register

Learn

Idioms for discussion: a double-edged sword (has good and bad sides), the tip of the iceberg (a small part of a bigger problem), a grey area (unclear), a vicious circle, a level playing field (fair competition), move the goalposts (change the rules unfairly).

Fixed expressions: by and large (generally), to all intents and purposes (in effect), for the time being, in the long run, on the whole, as a rule, at the end of the day.

Binomials (fixed pairs, fixed order): pros and cons, trial and error, ups and downs, sick and tired, peace and quiet, by and large, first and foremost, sooner or later. Cons and pros ✗.

Register: many idioms are neutral enough for semi-formal writing (a double-edged sword, the tip of the iceberg); others are informal (sick and tired, at the end of the day). Use them sparingly in essays.

Examples

  • Social media is a double-edged sword.
  • These complaints are just the tip of the iceberg.
  • By and large, the project was a success.
  • We found the solution through trial and error.

Vocabulary

double-edged sword

something with both advantages and disadvantages

vicious circle

a bad situation that keeps making itself worse

grey area

a situation that is not clear

binomial

a fixed pair of words joined by and/or

level playing field

a fair situation for everyone

Practice

1 / 8

Technology can be a ___: it connects and isolates us.

Speaking

Discuss a complex issue (e.g. remote work, AI, tourism) for 90 seconds using at least five idioms or fixed expressions naturally.

Recording isn’t available in this browser. You can still practise: say your answer aloud, then type what you said.

Writing

Write a semi-formal blog paragraph (130–160 words) on the pros and cons of a technology, using four suitable idioms or fixed expressions.

0 / 130+ words

Lesson quiz

1 / 5

“By and large” means…

Review

Key points

  • Discussion idioms: double-edged sword, tip of the iceberg, grey area.
  • Fixed expressions: by and large, to all intents and purposes.
  • Binomials: fixed order.
  • Check register.

What you learned

  • ✓ I use C1 idioms accurately.
  • ✓ I know fixed expressions and binomials.
  • ✓ I match idioms to register.