*SET-U

English word origin

Etymology of Eau

From Old English ēa (“running water, water, stream, river”), from Proto-Germanic *ahwō (“waters, river”), from Proto-Indo-European *h₂ekʷeh₂ (“water, flowing water”). Cognate with North Frisian ia (“river”), Saterland Fr

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 ↗
name

Any of several rivers in Lincolnshire.

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

From Old English ēa (“running water, water, stream, river”), from Proto-Germanic *ahwō (“waters, river”), from Proto-Indo-European *h₂ekʷeh₂ (“water, flowing water”). Cognate with North Frisian ia (“river”), Saterland Frisian Äi (“river”), West Frisian ie (“water, stream”), Dutch aa (“water, stream”), German Ache (“water, stream, river, flood”), Swedish å (“stream, creek”), Icelandic á (“stream, river”), Latin aqua (“water”). Doublet of aqua and yeo. Related to, but not derived from, French eau ("water").

Relationships mentioned by the source

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

  • Inherited-form mentionēaang
  • Inherited-form mention*ahwōgem-pro
  • Derivation mention*h₂ekʷeh₂ine-pro
  • Cognate mentioniafrr
  • Cognate mentionÄistq
  • Cognate mentioniefy
  • Cognate mentionaanl
  • Cognate mentionAchede
  • Cognate mentionåsv
  • Cognate mentionáis
  • Cognate mentionaquala
  • Doublet mentionaquaen
  • Doublet mentionyeoen
  • Cognate mentioneaufr
Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "dercat",
      "args": {
        "1": "en",
        "2": "ine-pro"
      },
      "expansion": ""
    },
    {
      "name": "langname",
      "args": {
        "1": "ine-pro"
      },
      "expansion": "Proto-Indo-European"
    },
    {
      "name": "word",
      "args": {
        "1": "en",
        "2": "ine",
        "3": "h₂ékʷeh₂"
      },
      "expansion": ""
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "ēa",
        "4": "",
        "5": "running water, water, stream, river"
      },
      "expansion": "Old English ēa (“running water, water, stream, river”)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*ahwō",
        "4": "",
        "5": "waters, river"
      },
      "expansion": "Proto-Germanic *ahwō (“waters, river”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*h₂ekʷeh₂",
        "4": "",
        "5": "water, flowing water"
      },
      "expansion": "Proto-Indo-European *h₂ekʷeh₂ (“water, flowing water”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "frr",
        "2": "ia",
        "3": "",
        "4": "river"
      },
      "expansion": "North Frisian ia (“river”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "stq",
        "2": "Äi",
        "3": "",
        "4": "river"
      },
      "expansion": "Saterland Frisian Äi (“river”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "fy",
        "2": "ie",
        "3": "",
        "4": "water, stream"
      },
      "expansion": "West Frisian ie (“water, stream”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "aa",
        "3": "",
        "4": "water, stream"
      },
      "expansion": "Dutch aa (“water, stream”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "Ache",
        "3": "",
        "4": "water, stream, river, flood"
      },
      "expansion": "German Ache (“water, stream, river, flood”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "å",
        "3": "",
        "4": "stream, creek"
      },
      "expansion": "Swedish å (“stream, creek”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "is",
        "2": "á",
        "3": "",
        "4": "stream, river"
      },
      "expansion": "Icelandic á (“stream, river”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "la",
        "2": "aqua",
        "3": "",
        "4": "water"
      },
      "expansion": "Latin aqua (“water”)"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "aqua",
        "3": "yeo"
      },
      "expansion": "Doublet of aqua and yeo"
    },
    {
      "name": "cog",
      "args": {
        "1": "fr",
        "2": "eau"
      },
      "expansion": "French eau"
    }
  ],
  "links": [
    [
      "ēa",
      "ea#Old_English"
    ],
    [
      "*ahwō",
      "Reconstruction:Proto-Germanic/ahwō"
    ],
    [
      "*h₂ekʷeh₂",
      "Reconstruction:Proto-Indo-European/h₂ekʷeh₂"
    ],
    [
      "ia",
      "ia#North_Frisian"
    ],
    [
      "Äi",
      "Äi#Saterland_Frisian"
    ],
    [
      "ie",
      "ie#West_Frisian"
    ],
    [
      "aa",
      "aa#Dutch"
    ],
    [
      "Ache",
      "Ache#German"
    ],
    [
      "å",
      "å#Swedish"
    ],
    [
      "á",
      "á#Icelandic"
    ],
    [
      "aqua",
      "aqua#Latin"
    ],
    [
      "aqua",
      "aqua#English"
    ],
    [
      "yeo",
      "yeo#English"
    ],
    [
      "eau",
      "eau#French"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "name",
      "glosses": [
        "Any of several rivers in Lincolnshire."
      ],
      "tags": [],
      "recordId": "b60f8158b509b9bfcb1d3a5ae87c16b4aa5d517b3ced8f400a699d4e7ffd98cf",
      "rawRecordSha256": "5db27b36c1b3da05c10f9f2eb06b85f7875965cb1b0995df35922b2182538282",
      "sourceRecordOrdinal": 5624593
    }
  ],
  "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 Eau →

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-RWF1