It indicates a sudden or forceful breaking or separation.
Here are some examples of words using the root -rupt:
* Abrupt: Sudden and unexpected.
* Bankrupt: Unable to pay debts.
* Corrupt: Dishonest or immoral.
* Disrupt: To break up or interrupt.
* Erupt: To burst forth, as with a volcano.
* Interrupt: To break into or stop something.
* Rupture: A break or tear.
* Uprupt: Sudden and unexpected.
Therefore, any word containing the root -rupt is likely related to the concept of something breaking, bursting, or separating.