The word 'trier' originates from the Anglo-French verb 'trier', meaning to pick out, sift, or test, which itself has Germanic roots. This verb evolved into the modern English 'try', carrying the core sense of making an attempt or effort. The agent suffix '-er', of Old English origin, is then appended to form a noun denoting 'one who tries'. Consequently, the literal meaning of 'one who makes an attempt' developed into its modern dual sense: a person who perseveres and puts in effort, and a legal official (judge or juror) who examines evidence to test a case.

Structure: try (attempt) + er (agent suffix) try (from Anglo-French 'trier', meaning to pick out, sift, or test, of Germanic origin) + er (agent noun suffix, from Old English '-ere', of Germanic origin)