the tip of the iceberg
idiomPart oficeberg
the tip of the iceberg — idiom
1. used to describe a situation where what you can see or know about a problem is o
1.idiom
Definition
used to describe a situation where what you can see or know about a problem is only a small part of something much larger and more serious that remains hidden
Example
The few cases of bullying that parents reported are only the tip of the iceberg.
The company's recent losses are just the tip of the iceberg of a much deeper financial crisis.