اصطلاح امروز The Tip of the Iceberg

The Tip of the Iceberg:

When we say something is just the tip of the iceberg we mean that thing is just a small part of a much bigger problem.

e.g. This figure represents only the tip of the iceberg, since as many as 90% of cases go unreported.

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A major difficulty with idioms is that they are fixed expressions which cannot be changed.

Note: Be careful not to use ‘the top of the iceberg’ in mistake for ‘the tip of the iceberg’.

Persian equivalent :