Some idioms are rooted in cultural history or traditions and may not translate well into other languages. Saying 'bite the bullet' may confuse learners not familiar with historical wartime medical practices.
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Figurative Meaning
Idioms should be understood figuratively, not literally; they express ideas in creative ways. When someone says 'break a leg', they are actually wishing you good luck.
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Non-literal Use
Understanding the non-literal meaning of idioms can be challenging, but it's essential for fluency. He 'let the cat out of the bag' about the surprise party, ruining the secret.