*SET-U

English word origin

Etymology of flea

From Middle English fle, from Old English flēah, flēa, from Proto-West Germanic *flauh, from Proto-Germanic *flauhaz (compare West Frisian flie, Low German Flo, Flö, Dutch vlo, German Floh, Icelandic fló), from pre-Germa

2 source sectionsExtended source reportWiktionary original ↗
In this entry · 2 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 ↗
verb

To remove fleas from (an animal).

noun

A small, wingless, parasitic insect of the order Siphonaptera, renowned for its bloodsucking habits and jumping abilities. · A thing of no significance.

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

From Middle English fle, from Old English flēah, flēa, from Proto-West Germanic *flauh, from Proto-Germanic *flauhaz (compare West Frisian flie, Low German Flo, Flö, Dutch vlo, German Floh, Icelandic fló), from pre-Germanic *plóukos, *plówkos, from or akin to Proto-Indo-European *plus- (compare Latin pulex, Sanskrit प्लुषि (plúṣi)). The archaic plural fleen is from Middle English fleen, flen, from Old English flēan (“fleas”).

Relationships mentioned by the source

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

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": "fle"
      },
      "expansion": "Middle English fle"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "flēah"
      },
      "expansion": "Old English flēah"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gmw-pro",
        "3": "*flauh"
      },
      "expansion": "Proto-West Germanic *flauh"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*flauhaz"
      },
      "expansion": "Proto-Germanic *flauhaz"
    },
    {
      "name": "cog",
      "args": {
        "1": "fy",
        "2": "flie"
      },
      "expansion": "West Frisian flie"
    },
    {
      "name": "cog",
      "args": {
        "1": "nds",
        "2": "Flo"
      },
      "expansion": "Low German Flo"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "vlo"
      },
      "expansion": "Dutch vlo"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "Floh"
      },
      "expansion": "German Floh"
    },
    {
      "name": "cog",
      "args": {
        "1": "is",
        "2": "fló"
      },
      "expansion": "Icelandic fló"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*plus-"
      },
      "expansion": "Proto-Indo-European *plus-"
    },
    {
      "name": "cog",
      "args": {
        "1": "la",
        "2": "pulex"
      },
      "expansion": "Latin pulex"
    },
    {
      "name": "cog",
      "args": {
        "1": "sa",
        "2": "प्लुषि",
        "tr": "plúṣi"
      },
      "expansion": "Sanskrit प्लुषि (plúṣi)"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "fleen"
      },
      "expansion": "Middle English fleen"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "flēan",
        "t": "fleas"
      },
      "expansion": "Old English flēan (“fleas”)"
    }
  ],
  "links": [
    [
      "fle",
      "fle#Middle_English"
    ],
    [
      "flēah",
      "fleah#Old_English"
    ],
    [
      "flēa",
      "flea#Old_English"
    ],
    [
      "*flauh",
      "Reconstruction:Proto-West Germanic/flauh"
    ],
    [
      "*flauhaz",
      "Reconstruction:Proto-Germanic/flauhaz"
    ],
    [
      "flie",
      "flie#West_Frisian"
    ],
    [
      "Flo",
      "Flo#Low_German"
    ],
    [
      "Flö",
      "Flö#Low_German"
    ],
    [
      "vlo",
      "vlo#Dutch"
    ],
    [
      "Floh",
      "Floh#German"
    ],
    [
      "fló",
      "fló#Icelandic"
    ],
    [
      "*plus-",
      "Reconstruction:Proto-Indo-European/plus-"
    ],
    [
      "pulex",
      "pulex#Latin"
    ],
    [
      "प्लुषि",
      "प्लुषि#Sanskrit"
    ],
    [
      "fleen",
      "fleen"
    ],
    [
      "fleen",
      "fleen#Middle_English"
    ],
    [
      "flen",
      "flen#Middle_English"
    ],
    [
      "flēan",
      "flean#Old_English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "To remove fleas from (an animal)."
      ],
      "tags": [
        "transitive"
      ],
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    },
    {
      "pos": "noun",
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        "A small, wingless, parasitic insect of the order Siphonaptera, renowned for its bloodsucking habits and jumping abilities.",
        "A thing of no significance."
      ],
      "tags": [
        "derogatory"
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  "omittedAuxiliaryFields": {
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}

Source etymology 2

Original entry ↗
verb

Obsolete spelling of flay.

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

Alternative forms.

Inspect preserved source fields

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

{
  "templates": [],
  "links": [],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "verb",
      "glosses": [
        "Obsolete spelling of flay."
      ],
      "tags": [
        "alt-of",
        "obsolete"
      ],
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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 flea →

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-ZmxlYQ