/kəmˈpjuːt/
[verb] To calculate something using numbers or a machine. It can also mean to work out an answer or result through careful thought or mathematical steps.
Every time you say 'computer', you are really talking about a person — because that was the original meaning.
The story of 'compute' begins in ancient Rome, with a Latin verb that had almost nothing to do with machines. The Latin word 'putare' meant to prune, to cleanse, or to set in order — the idea being that you were cutting away what was unnecessary to arrive at something pure and correct. From this root came 'computare', formed by adding the prefix 'com-' (meaning 'together' or 'completely'), giving a sense of tallying things up, or reckoning accounts in full. Roman merchants and administrators used 'computare' when settling financial records, making it a word rooted firmly in the world of money, trade, and practical organisation.
From Latin, the word moved into Old French as 'computer' or 'compter', carrying the same meaning of counting and calculating. Old French 'compter' then passed into Middle English, giving rise to 'count' — the everyday English word we still use today. This is why 'compute' and 'count' are genuine cousins: both descend from Latin 'computare → Old French compter → Middle English count', though they arrived in English at different times and through slightly different routes. The more formal 'compute' came directly from the Latin form, rather than through the French, when English scholars began reaching back to classical sources during the Renaissance.
English adopted 'compute' in the early 17th century, primarily in scientific and mathematical writing. The word felt more precise and elevated than the humble 'count', and it suited the new spirit of the age — an era of careful measurement, astronomical observation, and rational enquiry. Writers like Francis Bacon used language like this to describe systematic thinking, and 'compute' quickly settled into the vocabulary of science, navigation, and philosophy. It described the work done by human minds wrestling with numbers, not by any kind of machine.
For most of its life in English, 'compute' described something that people did. In fact, the noun form 'computer', which appeared in the early 17th century as well, originally meant a person whose job was to perform calculations — often women employed by observatories, government offices, or military organisations to work through enormous tables of figures by hand. These human computers were essential to science and warfare for centuries, and the word carried that human meaning right up until the mid-20th century.
Everything changed after the Second World War, when electronic calculating machines began to take over the work that human computers had done. Engineers and scientists naturally called these machines 'computers' — they computed, after all — and gradually the machine swallowed the word entirely. By the 1950s, 'computer' almost exclusively meant the electronic device, and by the 1970s the older human meaning had been largely forgotten. The verb 'compute' followed along, shifting from describing purely mental or written calculation to describing what machines do when they process data. A word born in Roman account books, refined by Renaissance scholars, and carried for centuries by rooms full of working people, finally found its most famous home inside a box of circuits and silicon.