a person who always makes an effort, however unsuccessful they may be

Kelly was described by her teachers as a real trier

a person or body responsible for investigating and deciding a case judicially

the jury is the trier of fact

a city on the River Mosel in Rhineland-Palatinate, western Germany; population 103,500 (est. 2006). Established by a Germanic tribe, the Treveri, c.400 BC, Trier is one of the oldest cities in Europe. It was a powerful archbishopric from 815 until the 18th century, but fell into decline after the French occupation in 1797