The Origin of the Word “Robot”: From a Czech Play to the Factory Floor

The word “robot” was invented in 1920 — not by an engineer, but by a painter. The Czech writer Karel Čapek needed a name for the artificial workers in his play R.U.R., and his brother Josef — brush in mouth at his easel — suggested “robot,” from the Czech robota, the forced labour that serfs owed their lords. The origin of the word robot is a story of slavery, theatre, and a word that escaped its play to name the machine age.

It is one of the youngest common words in English. A century ago it did not exist at all. Today it names everything from factory arms to the checkbox that asks you to prove you are not one.

What is the origin of the word “robot”?

The root is heavy with history. Robota is an old Czech word for the corvée — the unpaid days of work a serf owed to the lord whose land he farmed. It was labour that came with the land, not with a wage: a set number of days each week spent working someone else’s fields. The word reaches back through Old Church Slavonic rabota, servitude, to rab, a slave — and it echoes across the Slavic languages. In Slovak, robotník still means a worker, and the verb robiť means to work.

So the word Čapek chose carried centuries of meaning: not just work, but work done under compulsion, for someone else’s benefit — a shadow the word has never quite shaken.

Who invented the word “robot”?

The honest answer is Josef Čapek — though the world usually credits his brother. Karel Čapek wrote the play; Josef, a painter and graphic artist, supplied the word. Karel told the story himself, in print, in the Prague newspaper Lidové noviny in December 1933, in a short essay called “About the Word Robot.” He had the idea for the play, he wrote, and rushed to tell his brother, who was standing before his easel, painting away — and admitted he did not know what to call his artificial workers.

“I could call them Labori,” he said, “but that strikes me as a bit bookish.”

“Then call them Robots,” the painter muttered, brush in mouth, and went on painting.

“And that is how it was,” Karel wrote. “Thus was the word Robot born; let this acknowledge its true creator.”

The credit usually goes to Karel anyway, since it was his play that carried the word into the world — but he corrected the attribution for the rest of his life.

What was R.U.R. about?

R.U.R. stands for Rossum’s Universal Robots — Rossumovi Univerzální Roboti in Czech. The play is set in a factory on a remote island, where a company manufactures artificial people and sells them by the thousand as cheap labour. The old Rossum had discovered a way to make living matter; his nephew turned it into a business, simplifying the workers until they had no feelings, no desires, and no souls — only the ability to work.

The world reorganises itself around them: human beings stop working and grow soft, until the robots — given a soul of sorts by one of the factory’s scientists — rise up. The play ends with the last human alive and two robots who have learned something very like love: a bleak, strange ending for a play about machines.

Čapek wrote it during a summer holiday in 1920 in the spa town of Trenčianske Teplice. It was published in Prague in 1920 and premiered on 2 January 1921 — not in Prague, but in the provincial town of Hradec Králové, staged by an amateur company. The National Theatre production followed on 25 January, and within a year it was a sensation.

How did the word “robot” spread around the world?

Fast — faster than almost any word before it. The play was translated into English by Paul Selver and staged in New York by the Theatre Guild at the Garrick Theatre in 1922; London followed in 1923, in an adaptation by Nigel Playfair. By the mid-1920s the play had been performed in more than thirty countries, and the word had escaped the theatre into ordinary language.

It displaced older words that had done the same job for centuries. Before 1920, an artificial person in English was an “automaton” — a Greek word for something that moves by itself — or an “android,” a man-shaped thing. Neither word had the bite of “robot,” and neither carried its story. Within a decade, dictionaries were recording the new word, and by 1927 it was being linked in American writing to mechanical automation.

Čapek himself was startled by how quickly it travelled. He had written a play about the dangers of treating workers as things; the world took his word and used it to name the things themselves — like “OK”, another word born from a joke that conquered the world. It spread because it was short, strange, and exactly right.

Were Čapek’s robots made of metal?

No — and this is the detail most people get wrong. Čapek’s robots were not tin men. They were artificial people of synthetic flesh and blood, built in vats like living tissue, and they looked exactly like humans. In today’s language we would call them androids. The clanking metal robot with the riveted chest came later, from films and pulp magazines — most famously Maria, the gleaming machine-woman of Fritz Lang’s Metropolis (1927), and the tin robots of 1930s science-fiction covers.

The word quickly outgrew the play: within a generation, “robot” meant any machine that could carry out a complex series of movements on its own — metal or not, human-shaped or not. The name “Rossum” was itself a small joke, echoing the Czech rozum, reason or mind.

How did “robot” change meaning over the century?

The word kept growing new limbs. In 1941, Isaac Asimov coined “robotics” in his story “Liar!”, and a year later, in “Runaround” (1942), he published the Three Laws of Robotics — a robot must not harm a human, must obey orders, and must protect itself. Real roboticists still argue about them today.

Real robots followed the word. In 1961, the first industrial robot, Unimate, went to work on a General Motors assembly line in New Jersey, lifting hot die-castings that no human wanted to touch. From there the word spread into every workshop: welding robots, painting robots, robots that explore the ocean floor and the surface of Mars.

A century on from the origin of the word robot, the word has come home. Today a “robot” can be a piece of software that answers your questions, a vacuum cleaner that maps your living room, or a checkbox that asks you to prove you are not one. Čapek’s word for forced labour now names the machines we hope will do our forced labour for us — and the irony would not have been lost on him. He wrote a warning about treating human beings as tools; a century later, we use his word for the tools themselves.

Frequently Asked Questions

What is the origin of the word “robot”?

The word “robot” was coined in 1920 by the Czech painter Josef Čapek for his brother Karel’s play R.U.R. (Rossum’s Universal Robots). It comes from the Czech robota, meaning forced labour — the unpaid work serfs owed their lords — from Old Church Slavonic rabota (servitude), rooted in rab, a slave.

Who invented the word “robot” — Karel or Josef Čapek?

Josef Čapek invented it; Karel Čapek made it famous. Karel credited his brother in print in Lidové noviny in 1933, recalling that Josef suggested “robot” — brush in mouth, at his easel — when Karel rejected his own idea, “labori,” as too bookish.

When did the word “robot” first appear?

The word first appeared in print in Karel Čapek’s play R.U.R., published in Prague in 1920 and first performed on 2 January 1921 in Hradec Králové. It entered English through Paul Selver’s translation, staged in New York in 1922 and in London in 1923.

Were the robots in R.U.R. made of metal?

No. Čapek’s robots were artificial people made of synthetic flesh and blood, indistinguishable from humans. The metal robot came later, from films like Metropolis (1927) and pulp science fiction — but the name stuck to machines of every kind.