The word "Nerva" is a proper noun, specifically the name of a historical figure. Here’s a breakdown to help you understand it better:
"Nerva" refers to a Roman emperor who ruled from 96 to 98 AD. He is known for bringing a sense of freedom and stability to Rome after the oppressive rule of the previous emperor, Domitian. Nerva is also recognized for adopting Trajan as his successor, which helped ensure a smooth transition of power.
Nerva is a significant figure in Roman history, known for his role as a reforming emperor.