Which of the following words means to enlighten or inspire understanding?

The word "illuminate" is the most fitting choice as it conveys a sense of shedding light on a subject, both literally and metaphorically. When we say something is illuminated, we imply that it has been made clearer or more comprehensible, which aligns with the idea of enlightening or inspiring understanding. The word often carries connotations of deep understanding or insight, thereby enhancing knowledge in a profound way.

While "clarify" also deals with making something clearer, it tends to focus on simplicity and reducing confusion rather than providing enlightenment or inspiration. "Exemplify" refers to illustrating or demonstrating something through examples, which does not directly relate to inspiring understanding in the same comprehensive way that illuminate does. "Instruct" involves teaching or providing information but lacks the deeper connotation of enlightenment, which often implies leading someone to a higher level of understanding or insight. Thus, "illuminate" captures the essence of inspiring understanding effectively.