Le Guin's ansible goes out into the field

One invented word for instant messaging between stars, coined in 1966, given its theory in 1974 and then lent, with its author's blessing, to half of science fiction.

Kind: lineage · Span: 1966–2021 · Last reviewed: 2026-09-13

The line

Ursula K. Le Guin's first novel, Rocannon's World (Ace, 1966), has a League ethnologist on a lost planet with a box that talks to League headquarters across interstellar distance without delay. The box is called an ansible, and the estate's own page for the novel records that this is the word's first appearance. Le Guin's ansible is the dossier for the device and for what she did with it eight years later in The Dispossessed (1974), where the physicist Shevek works out the theory of simultaneity that makes it buildable and gives it away to everybody. So the word came first and the invention came second, in the same author's hands, which is the reverse of the usual order. Where the word itself came from is the one thing Le Guin never wrote down. The account that she clipped it from "answerable" survives only because Dave Goldman asked her and reported the answer on Usenet in April 2001, and the dictionaries have taken his word for it.

The borrowings are documented better than the coinage. Orson Scott Card used the word in "Ender's Game" (Analog, August 1977) and in the 1985 novel, whose text says the name was dredged out of an old book; on his own site he wrote that the word "originated with Ursula K. LeGuin" and that he used it "for the same reason that we all use 'robot' and 'waldo'", while the philotic mechanism was his own. That mechanism is Ender's philotic ansible, and its extension into a starship, Xenocide's Outside, is Card's alone; asked in 1999 whether philotes rest on any quantum physics he answered "no and no". Le Guin's side of the exchange is a Book View Café essay of 1 August 2010: she had been "happy to share the ansible with other science fiction writers", compared it to Heinlein's waldo and added that anarchists share stuff. She named no borrower. The dictionaries do: Vernor Vinge's "The Blabber" (1988), the novella that opened the Zones of Thought, has a character say "It's an ansible."; Elizabeth Moon uses the word from Winning Colors (1995) onward; a 1996 Deep Space Nine novel by L. A. Graf explains its ansible with twinned quantum particles; Dan Simmons, Terry Bisson, Paul Park, Neil Gaiman's 2013 Doctor Who script and Becky Chambers follow, and David Langford's newsletter has carried the name since 1979.

The physics cousin joins late and from the side. No Hainish text names a physical mechanism and no physics paper cites one. What happened instead is that quantum entanglement, which looks like instant action at a distance and is not, became the mechanism that later writers and readers reached for, and "ansible" became the generic word for the entanglement radio. The Graf novel of 1996 is the earliest such gloss in the dictionary record. The proposal is closed by the no-communication theorem, whose history is on entanglement signalling: Eberhard in 1978 and Ghirardi, Rimini and Weber in 1980 proved that measuring one half of a pair changes nothing the other half can see, and the FLASH proposal of 1982 died of the no-cloning theorem. Le Guin dodged the causality problem by keeping her ships slower than light; the physics dossier shows that the dodge is the only consistent move, since the register's CAU-1 turns any real ansible into a message to the past.

The links

What is not sourced

• "Answerable" in Le Guin's own hand. The derivation is universally repeated and rests on one Usenet post reporting a conversation. A letter, an interview transcript or a line in one of her essay collections would settle it. None was found, and the dossier at the other end says the same.
• Vinge's 1992 novel. A Fire Upon the Deep is on the catalogue for its Zones, and the word "ansible" is documented only in the 1988 novella that preceded it. Whether the novel uses the word was not verified for this page and the Zones dossier does not claim it. A text search of the novel would settle it.
• Bujold. Lois McMaster Bujold is often assumed to be on the list and is on no dictionary or encyclopedia list consulted here; her Vorkosigan books send messages through wormhole jumps by courier and tight-beam, not by ansible. Treated as absent until a citation appears.
• Kim Stanley Robinson. Wikipedia names 2312 (2012); no dictionary citation and no page number was found, so the claim is not in the links table.
• Simmons. The SF Encyclopedia says Ilium (2003); Wiktionary says Hyperion (1989). Only one dictionary-grade citation exists and it is for Ilium.
• The moment "ansible" became the generic word for an entanglement link. The 1996 Graf citation is the earliest gloss found, but nobody has written the history, and no physics paper uses the word.

Sources

• S1 Le Guin, U. K., Rocannon's World (Ace, 1966) and The Dispossessed (Harper and Row, 1974), as read for the fiction dossier; not re-read for this page.
• S1 The Ursula K. Le Guin estate site, page for Rocannon's World (ursulakleguin.com), read 2026-09-13 for the first-appearance sentence.
• S1 Le Guin, U. K., "Art, Information, Theft, and Confusion, part two", Book View Café, 1 August 2010, reproduced at ursulakleguin.com. Read 2026-09-13.
• S1 Card, O. S., "OSC Answers Questions", Hatrack River, question 4 (undated) and question 14 (5 October 1999). Both read 2026-09-13.
• S1 Card, O. S., "Ender's Game", Analog, August 1977; Ender's Game (Tor, 1985); Xenocide (Legend, 1991). Via the two Card dossiers.
• S1 Eberhard, P., Nuovo Cimento B 46, 392 (1978); Ghirardi, Rimini and Weber, Lett. Nuovo Cimento 27, 293 (1980); Herbert, N., Found. Phys. 12, 1171 (1982); Wootters and Zurek, Nature 299, 802 (1982); Dieks, D., Phys. Lett. A 92, 271 (1982). Via the entanglement signalling dossier.
• S3 Historical Dictionary of Science Fiction (sfdictionary.com), entry "ansible", citations 1966 to 2021. Read 2026-09-13.
• S3 SF Encyclopedia, "Ansible". Read 2026-09-13.
• S3 Wiktionary, "ansible", citing Goldman, D., rec.arts.sf.written, 7 April 2001, Message-ID dave-0704011253140001@ip154.pdx7.pacifier.com. Read 2026-09-13.
• S3 Quinion, M., "Ansible", World Wide Words, for the Goldman post. Read in part.
• S3 Wikipedia, "Ansible", for the list of later users. Read 2026-09-13.
• S3 Google Groups thread "Vernor Vinge's A Fire Upon the Deep", rec.arts.sf.written, on the ansible in "The Blabber"; could not be opened, cited from a search excerpt.