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English word origin

Etymology of grok

Coined ex nihilo by American author and engineer Robert A. Heinlein in 1961 in his novel Stranger in a Strange Land. Heinlein invented the word for his fictitious Martian language. It is described as meaning "to drink" a

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In this entry · 1 source sections

The source etymologies

Wiktionary via Kaikki / Wiktextract

The source reports below are imported and unreviewed by *SET-U. Separate numbered origins and differing source variants are preserved; agreement within this extraction is not independent corroboration.

Unnumbered source etymology

Original entry ↗
verb

To understand (something) intuitively, to know (something) without having to think intellectually. · To fully and completely understand something in all of its details and intricacies.

Selected source glosses provide context, not a complete modern definition inventory

Coined ex nihilo by American author and engineer Robert A. Heinlein in 1961 in his novel Stranger in a Strange Land. Heinlein invented the word for his fictitious Martian language. It is described as meaning "to drink" and, figuratively, "to drink in all available aspects of reality", "to become one with the observed". William Tenn asked Heinlein if it could have been inspired by the term griggo, which featured in Tenn's "Venus and the Seven Sexes" (1949); Heinlein "looked startled, then thought about it for a long time (and) shrugged, (saying) 'It's possible, very possible.'"

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

{
  "templates": [
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "id": "understand",
        "exnihilo": "1"
      },
      "expansion": ""
    },
    {
      "name": "coinage",
      "args": {
        "1": "en",
        "2": "Robert A. Heinlein",
        "in": "1961",
        "nat": "American",
        "occ": "author",
        "occ2": "engineer",
        "nobycat": "1",
        "exnihilo": "1"
      },
      "expansion": "Coined ex nihilo by American author and engineer Robert A. Heinlein in 1961"
    },
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        "id": "understand",
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      },
      "expansion": ""
    }
  ],
  "links": [
    [
      "ex nihilo",
      "ex nihilo"
    ],
    [
      "drink in",
      "drink in"
    ]
  ],
  "references": [],
  "descendants": [
    {
      "lang": "Dutch",
      "lang_code": "nl",
      "word": "grokken",
      "raw_tags": [
        "borrowed"
      ]
    },
    {
      "lang": "French",
      "lang_code": "fr",
      "word": "gnoquer",
      "raw_tags": [
        "borrowed"
      ]
    },
    {
      "lang": "Italian",
      "lang_code": "it",
      "word": "groccare",
      "raw_tags": [
        "borrowed"
      ]
    },
    {
      "lang": "Japanese",
      "lang_code": "ja",
      "word": "グロック",
      "raw_tags": [
        "borrowed"
      ],
      "roman": "gurokku"
    },
    {
      "lang": "Russian",
      "lang_code": "ru",
      "word": "гро́кать",
      "raw_tags": [
        "borrowed"
      ],
      "roman": "grókatʹ"
    },
    {
      "lang": "Russian",
      "lang_code": "ru",
      "word": "гро́кнуть",
      "raw_tags": [
        "borrowed"
      ],
      "roman": "gróknutʹ"
    },
    {
      "lang": "Slovene",
      "lang_code": "sl",
      "word": "gročiti",
      "raw_tags": [
        "borrowed"
      ]
    },
    {
      "lang": "Turkish",
      "lang_code": "tr",
      "word": "groklamak",
      "raw_tags": [
        "borrowed"
      ]
    }
  ],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "To understand (something) intuitively, to know (something) without having to think intellectually.",
        "To fully and completely understand something in all of its details and intricacies."
      ],
      "tags": [
        "slang",
        "transitive"
      ],
      "recordId": "491945e28d9f5737c506d1cdc1ae08291b317f498d71e583ac47871d11b4d8a1",
      "rawRecordSha256": "c79d8926e79515b53389e970001cb55330742ca720a7c8409fb460e08e44b668",
      "sourceRecordOrdinal": 6589
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "glosses": 0
  }
}

Where this record stops

This page does not supply an independently verified sound-change sequence, first-use manuscript or complete family tree unless a cited analysis explicitly establishes one. Missing detail here is a limit of this record—not a claim that humanity knows nothing more.

An older meaning does not determine what a word must mean today. Follow the sources, preserve disagreements, and keep ancestry separate from interpretation.

Contribute located evidence for grok →

Source and snapshot

Imported from Wiktionary contributors; extracted by Tatu Ylonen / Wiktextract / Kaikki.org. Selected fields are reformatted and grouped; wording, source identity and etymology sections are retained. CC-BY-SA-4.0 applies to the imported source material.

Dump: 2026-10-01 · Extracted: 2026-10-30. These are snapshot dates, not the word’s first attestation or the page’s revision date.

Source entry and bibliography ↗Wiktionary revision history ↗Acquisition and rights ledger
Machine-source provenance
Source SHA-256
5ff2c072f8099f2d2ce484bd6957bf179f046d2ad37bc36555edf8bb84cb5291
Import run
73216b9a9b78ed3830994bf853103716f5a4dc57099e371e9f8fdc468facca26
Permanent entry ID
w-Z3Jvaw