What is interest paid on an original amount deposited in a bank plus any interest that has been paid?

The interest paid on an original amount deposited in a bank, along with any interest that has been accrued, is referred to as "compound interest." This type of interest increases over time as interest is calculated on both the initial principal and the accumulated interest from previous periods. This can lead to significant growth of the investment or savings over time, especially with higher interest rates and longer durations.