The word 'triage' brings the threshing floor into the emergency room. Its ultimate ancestor is PIE *terh₁- (to rub, to grind, to bore), a root associated with the fundamental agricultural act of separating grain from chaff — wheat from waste. From this root descended Latin 'terere' (to rub, to thresh, to wear away), and from a related Gallo-Roman form descended Old French 'trier' (to sort, to sift, to pick out). The French noun 'triage' meant simply the act of sorting — selecting the good from the bad, the valuable from the worthless, the usable from the discarded.
The word entered military medicine through the system developed in the Napoleonic Wars by Dominique Larrey — the same surgeon who invented the ambulance. Larrey established procedures for sorting the wounded by the severity of their injuries, to determine who needed immediate treatment, who could wait, and who could not be saved. This system was systematized during World War I, when the scale of casualties from trench warfare overwhelmed medical capacity and forced armies to develop formal priority protocols. The English
The PIE root *terh₁- is remarkably productive in English, though the connections are often hidden. Latin 'terere' gave English 'attrition' (wearing away by friction, from 'atterere'), 'contrite' (ground down by remorse, from 'conterere'), 'detriment' (a wearing away, from 'deterere'), 'trite' (worn smooth by overuse), 'contrition,' 'tribulation' (a threshing, from 'tribulum,' a threshing board). In the Germanic branch, the root produced Old English 'thrawan' (to twist, to turn), which became Modern English 'throw' — originally meaning to twist or spin, not to project through the air.
The Old French verb 'trier' also gave English 'try,' 'trial,' and 'retry.' To 'try' something was originally to sort it out, to test it and determine its quality — the same act as triage but applied to objects rather than patients. A legal trial is an attempt to sort truth from falsehood. 'Trying' circumstances are ones that test and strain. The semantic thread connecting a medieval sorting shed to an emergency ward to a courtroom to everyday frustrated effort runs through
In modern emergency medicine, triage is formalized into color-coded categories: immediate (red), delayed (yellow), minimal (green), and expectant (black, meaning survival unlikely even with treatment). The expectant category — patients who are set aside to die because resources must go to the survivable — is the most ethically charged decision in medicine, and the word 'triage' carries this weight in its core meaning: to sort is to choose who is chosen.