*SET-U

English word origin

Etymology of geas

Borrowed, like English geis, from Irish geis (“injunction; taboo, prohibition, spell”). The pronunciation resembles Irish geis, though the spelling matches its synonymous but heterophonous alternative form geas.

1 source sectionExtended source reportWiktionary original ↗
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 ↗
noun

A (generally magical) vow, obligation or injunction placed upon someone to do or not do something, which typically brings harm if violated and blessings if obeyed. · A mystical compulsion.

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

Borrowed, like English geis, from Irish geis (“injunction; taboo, prohibition, spell”). The pronunciation resembles Irish geis, though the spelling matches its synonymous but heterophonous alternative form geas.

Relationships mentioned by the source

These are extracted mentions, not a timeline or a verified sequence of immediate parents.

  • Borrowed-form mentiongeisga
Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "m+",
      "args": {
        "1": "en",
        "2": "geis"
      },
      "expansion": "English geis"
    },
    {
      "name": "bor",
      "args": {
        "1": "en",
        "2": "ga",
        "3": "geis",
        "4": "",
        "5": "injunction; taboo, prohibition, spell"
      },
      "expansion": "Irish geis (“injunction; taboo, prohibition, spell”)"
    },
    {
      "name": "m+",
      "args": {
        "1": "ga",
        "2": "geis"
      },
      "expansion": "Irish geis"
    }
  ],
  "links": [
    [
      "geis",
      "geis#English"
    ],
    [
      "geis",
      "geis#Irish"
    ],
    [
      "geis",
      "geis#Irish"
    ],
    [
      "geas",
      "geas#Irish"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "A (generally magical) vow, obligation or injunction placed upon someone to do or not do something, which typically brings harm if violated and blessings if obeyed.",
        "A mystical compulsion."
      ],
      "tags": [],
      "recordId": "b84001353248590cb495fa3d1a6fc10e7f34feb8b7236d932f99ebae8e450ad2",
      "rawRecordSha256": "534da0438de8bfe91bded9578e69b407cbf71fb73d35f876e2b18f8327a573c5",
      "sourceRecordOrdinal": 548271
    }
  ],
  "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 geas →

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-Z2Vhcw