A submerged rock or reef in the sea that is dangerous to ships.
A bombora can make people think of danger, the ocean, and shipwrecks.
Examples:
The sailors were afraid of the bombora.
The ship hit the bombora and sank.
The bombora is under the water.
The bombora is like a hidden rock in the sea.
The bombora is so big that it can sink a hundred ships.
The bombora is the reason why many ships are at the bottom of the sea.