góra lodowa Anglais:

The passengers were asleep in their cabins when the ship hit a huge iceberg.

What you see above the water is just the tip of the iceberg.

The part of an iceberg under the water is much larger than that above the water.

tip of the iceberg

The Titanic sunk after colliding with an iceberg.

The Titanic hit an iceberg and sank to the bottom of the ocean.

He is leaving a ship which he himself has steered towards an iceberg.

It was an iceberg that sank the Titanic.

Only the tip of an iceberg shows above the water.

In Korea, there's a popular theory that says that: "If you eat a quarter of an Iceberg lettuce, you will fall asleep". Thus, amongst truck drivers in Korea, lettuce is known as something that should not be eaten before work.