The term INTENSE IN FORCE can be summarized as a VIOLENT force that is very strong and powerful. This phrase is often used to describe a situation in which a great amount of energy or power is being exerted, such as a storm, an earthquake, or a battle. It can also be used to describe a person's emotions or behavior, such as intense anger or intense passion. In this context, the crossword solution VIOLENT is an appropriate description of the term INTENSE IN FORCE.