Useful English Word or Phrase to Boost Your English: Throw a Spanner (in the Works)
What does it mean?
To cause a problem or delay in a plan.
Is it positive or negative?
Negative.
When do you use it?
When something unexpected ruins or slows down progress.
Examples
Example 1: The delay threw a spanner in the works.
Example 2: His illness threw a spanner in the works.
Question for you
What can throw a spanner in the works for you?
Are you looking for English speaking practice online?
A phrase like "Throw a Spanner (in the Works)" can make you sound more natural straight away. I teach practical speaking in online English lessons with a British native speaker, so you know when and how to use it. You can also explore Throw a wobbly. Find out more here.
