Reach a climax is a phrase that is used to describe the highest point of an event or experience. It is often used in reference to a story or plot, where the climax is the most intense and exciting part of the narrative. The term can also be used to describe the peak of an emotion or feeling. In this context, it is used to describe the moment when something reaches its maximum intensity. The crossword solution for this term is 'CULMINATE, ' which means to reach a peak or climax.