Final answer:
The word 'digress' means to go off-topic or to deviate from the main point of discussion. It is often used when someone starts to talk about something unrelated to the main subject.
Step-by-step explanation:
The word digress means to go off on a tangent or to deviate from the main topic of discussion. An example of using 'digress' in a sentence might be: While discussing the causes of World War II, the teacher began to digress into a separate discussion about the intricacies of European art history, which, though interesting, was not the subject of the lesson.