"Triarii" is a Latin word that refers to a specific type of soldier in ancient Rome. They were often the most experienced and skilled soldiers, and they were known for their use of the "pilum," a type of spear. Some synonyms for "triarii" could include "veteran soldiers," "elite troops," "experienced warriors," or simply "pikemen." These terms emphasize the advanced training and battle experience that was required to become a member of this elite group. In modern military terminology, the closest equivalent might be a special forces unit or an elite infantry battalion. Regardless of the term used, the triarii were an important part of Roman military tactics and helped the empire maintain its authority for centuries.