/əˈsɛs/
[verb] To carefully look at something and decide its value, quality, or importance. You assess something when you want to understand it better or make a decision about it.
Every time you 'assess' something, you are etymologically 'sitting beside' a judge — the word comes from a Latin tax official who literally sat next to the court.
The story of 'assess' begins in ancient Rome, with the Latin verb 'assidere', meaning 'to sit beside' or 'to sit next to someone'. It is built from two parts: the prefix 'ad-' (meaning 'to' or 'next to') and 'sedere' (meaning 'to sit'). From this root also came the Medieval Latin 'assessare', which described the specific job of fixing the value of property for taxation purposes. The person who did this work sat beside the judge in court, ready to advise on financial matters — and that physical act of sitting alongside gave rise to the entire idea of official evaluation.
In the Roman legal world, the 'assessor' was not simply a passive figure. He was an expert adviser who helped the judge calculate what people owed in taxes or fines. Over time, the verb 'assessare' came to describe the action itself: the careful, methodical fixing of a value or amount. This was serious, consequential work, and the word carried that weight of official authority and judgment from its very beginning.
The word passed from Medieval Latin into Old French as 'assesser', keeping its meaning firmly connected to the fixing of taxes and legal values. When English borrowed it in the 15th century — most likely through the Anglo-French legal language that dominated English courts after the Norman Conquest — it arrived as 'assessen' and was used almost exclusively in the context of taxation. To 'assess' a property meant to officially decide how much tax was owed on it. This is also where we get the word 'assessment' and the noun 'assessor', both of which still carry traces of that original legal and financial setting.
What is striking about 'assess' is how its meaning expanded over the following centuries. By the 17th and 18th centuries, the word had moved beyond the tax office and into more general use, coming to mean any kind of careful evaluation or judgment. People began to 'assess' situations, risks, and abilities — not just property values. The idea of sitting carefully alongside something and measuring it with expert attention survived, even as the courtroom and the tax ledger faded from view.
Today, 'assess' is used in an enormous range of contexts — from teachers assessing students' work to doctors assessing a patient's condition to engineers assessing the safety of a bridge. What connects all these modern uses to that ancient Roman tax official is the core idea of deliberate, informed judgment. The Latin root 'sedere' ('to sit') also gave English words like 'sedentary' (sitting still), 'session' (a sitting or meeting), 'preside' (to sit before others), and 'reside' (to sit back, to dwell) — all words where the act of sitting implies something settled, purposeful, and serious. In 'assess', the seat beside the judge became a metaphor for all human acts of careful, considered evaluation.