*SET-U

English word origin

Etymology of flue

From Middle English flue, flewe (“mouthpiece of a hunting horn”), of uncertain origin. Perhaps a back-formation from Middle English *flews (mistaken as a plural), from Old English flēwsa (“a flow, flowing, flux”). Altern

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.

Source etymology 1

Original entry ↗
noun

A pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace). · An enclosed passageway in which to direct a current of air or other gases along. · A woolly or downy substance; down, nap; a piece of this. · In an organ flue pipe, the opening between the lower lip and the languet.

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

From Middle English flue, flewe (“mouthpiece of a hunting horn”), of uncertain origin. Perhaps a back-formation from Middle English *flews (mistaken as a plural), from Old English flēwsa (“a flow, flowing, flux”). Alternatively, perhaps an alteration of Middle English floute, fleute, flote (“a pipe”), see English flute. Compare also Middle Dutch vloegh (“groove, channel, flute of a fluted column”).

Relationships mentioned by the source

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

  • Inherited-form mentionflueenm
  • Derivation mention*flewsenm
  • Derivation mentionflēwsaang · a flow, flowing, flux
  • Derivation mentionflouteenm
  • Cognate mentionfluteen
  • Cognate mentionvloeghdum · groove, channel, flute of a fluted column
Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "flue"
      },
      "expansion": "Middle English flue"
    },
    {
      "name": "unc",
      "args": {
        "1": "en",
        "nocap": "1"
      },
      "expansion": "uncertain"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "*flews"
      },
      "expansion": "Middle English *flews"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "flēwsa",
        "t": "a flow, flowing, flux"
      },
      "expansion": "Old English flēwsa (“a flow, flowing, flux”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "floute"
      },
      "expansion": "Middle English floute"
    },
    {
      "name": "cog",
      "args": {
        "1": "en",
        "2": "flute"
      },
      "expansion": "English flute"
    },
    {
      "name": "cog",
      "args": {
        "1": "dum",
        "2": "vloegh",
        "t": "groove, channel, flute of a fluted column"
      },
      "expansion": "Middle Dutch vloegh (“groove, channel, flute of a fluted column”)"
    }
  ],
  "links": [
    [
      "flue",
      "flue#Middle_English"
    ],
    [
      "flewe",
      "flewe#Middle_English"
    ],
    [
      "*flews",
      "Reconstruction:Middle English/flews"
    ],
    [
      "flēwsa",
      "flewsa#Old_English"
    ],
    [
      "floute",
      "floute#Middle_English"
    ],
    [
      "fleute",
      "fleute#Middle_English"
    ],
    [
      "flote",
      "flote#Middle_English"
    ],
    [
      "flute",
      "flute#English"
    ],
    [
      "vloegh",
      "vloegh#Middle_Dutch"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "A pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace).",
        "An enclosed passageway in which to direct a current of air or other gases along.",
        "A woolly or downy substance; down, nap; a piece of this.",
        "In an organ flue pipe, the opening between the lower lip and the languet."
      ],
      "tags": [
        "countable",
        "obsolete",
        "uncountable"
      ],
      "recordId": "e72aacb1e2b1bae7056440408bf56675b3f9b1819df193a3776d7e6c8f2b4241",
      "rawRecordSha256": "d56b67144101d9795f7e0e22391c6e5ffb6ad3bb31595a5296c35fb592c1951e",
      "sourceRecordOrdinal": 150230
    }
  ],
  "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 flue →

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-Zmx1ZQ