*SET-U

English word origin

Etymology of floss

Unclear: * Possibly from French floche (“tuft of wool”), from floc, from Old French flosche (“down, velvet”), from Latin floccus (“piece of wool”), probably from Frankish *flokkō (“down, wool, flock”), from Proto-Germani

3 source sectionsExtended source reportWiktionary original ↗
In this entry · 3 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 clean the area between (the teeth) using floss. · To show off, especially by exhibiting one's wealth or talent. · To perform the floss dance move.

noun

A thread used to clean the gaps between the teeth. · Raw silk fibres. · The fibres covering a corncob etc.; the loose downy or silky material inside the husks of certain plants, such as beans. · Any thread-like material having parallel strands that are not spun or wound around each other.

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

Unclear: * Possibly from French floche (“tuft of wool”), from floc, from Old French flosche (“down, velvet”), from Latin floccus (“piece of wool”), probably from Frankish *flokkō (“down, wool, flock”), from Proto-Germanic *flukkô (“down, piece of wool, flock”), from Proto-Indo-European *plewk- (“hair, fibres, tuft”). * Or, from Middle English *flos (attested in Middle English Flosmonger (a surname)), from Proto-West Germanic *fleus, related to English fleece. Cognate with Old High German flocko (“down”), Middle Dutch vlocke (“flock”), Norwegian dialectal flugsa (“snowflake”), Dutch flos (“plush”) (tr=17c.).

Relationships mentioned by the source

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

  • Borrowed-form mentionflochefr
  • Derivation mentionfloschefro · down, velvet
  • Derivation mentionfloccusla · piece of wool
  • Derivation mention*flukkôgem-pro · down, piece of wool, flock
  • Derivation mention*plewk-ine-pro · hair, fibres, tuft
  • Inherited-form mention*flosenm
  • Cognate mentionFlosmongerenm
  • Derivation mention*fleusgmw-pro
  • Cognate mentionfleeceen
  • Cognate mentionflockogoh
  • Cognate mentionvlockedum
  • Cognate mentionflosnl

This page abbreviates 3 auxiliary source items. The etymology narrative is not shortened. Omission counts are available in the audit fields below; consult the original for complete auxiliary material.

Inspect preserved source fields

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

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      "name": "wp",
      "args": {
        "1": "dental +"
      },
      "expansion": ""
    },
    {
      "name": "unc",
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        "title": "Unclear"
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      "expansion": "French floche (“tuft of wool”)"
    },
    {
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      "args": {
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        "2": "fro",
        "3": "flosche",
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    },
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    },
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    },
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      "expansion": "Middle English *flos"
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    },
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      "name": "cog",
      "args": {
        "1": "dum",
        "2": "vlocke",
        "3": "",
        "4": "flock"
      },
      "expansion": "Middle Dutch vlocke (“flock”)"
    },
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        "2": "flos",
        "3": "",
        "4": "plush"
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    }
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      "floche#French"
    ],
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      "floc",
      "floc#French"
    ],
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      "flosche",
      "flosche#Old_French"
    ],
    [
      "floccus",
      "floccus#Latin"
    ],
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      "*flokkō",
      "Reconstruction:Proto-West Germanic/flokkō"
    ],
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      "*flukkô",
      "Reconstruction:Proto-Germanic/flukkô"
    ],
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      "Reconstruction:Proto-Indo-European/plewk-"
    ],
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      "*flos",
      "Reconstruction:Middle English/flos"
    ],
    [
      "Flosmonger",
      "Flosmonger#Middle_English"
    ],
    [
      "*fleus",
      "Reconstruction:Proto-West Germanic/fleus"
    ],
    [
      "fleece",
      "fleece#English"
    ],
    [
      "flocko",
      "flocko#Old_High_German"
    ],
    [
      "vlocke",
      "vlocke#Middle_Dutch"
    ],
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      "flugsa",
      "flugsa#Norwegian"
    ],
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      "flos",
      "flos#Dutch"
    ]
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  "descendants": [],
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        "To clean the area between (the teeth) using floss.",
        "To show off, especially by exhibiting one's wealth or talent.",
        "To perform the floss dance move."
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        "slang",
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Source etymology 2

Original entry ↗
noun

A small stream of water. · Fluid glass floating on iron in the puddling furnace, produced by the vitrification of oxides and earths which are present.

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

From dialectal flosh (“a flush, stream of water, sluice”), from Middle English flosche, flusche, flasche, flaske (“a watery or marshy place, swamp”), perhaps from Old French flache, from Middle Dutch vlacke (“a flat area, plain”), ultimately related to Proto-West Germanic *fleutan. Compare also German Floss (“a float”).

Relationships mentioned by the source

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

  • Inherited-form mentionfloscheenm
  • Derivation mentionflachefro
  • Derivation mentionvlackedum · a flat area, plain
  • Derivation mention*fleutangmw-pro
  • Cognate mentionFlossde
Inspect preserved source fields

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

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        "3": "flosche"
      },
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    },
    {
      "name": "der",
      "args": {
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        "2": "fro",
        "3": "flache"
      },
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    },
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    },
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    },
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      "name": "cog",
      "args": {
        "1": "de",
        "2": "Floss",
        "3": "",
        "4": "a float"
      },
      "expansion": "German Floss (“a float”)"
    }
  ],
  "links": [
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      "flosh#English"
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      "flusche#Middle_English"
    ],
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      "flasche#Middle_English"
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      "flache#Old_French"
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      "vlacke#Middle_Dutch"
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Source etymology 3

Original entry ↗
noun

The common rush (Juncus effusus).

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

Origin obscure. Perhaps of North Germanic origin. Compare Norwegian flos, flus (“rind, scale, strip peeled off”).

Relationships mentioned by the source

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

  • Cognate mentionflosno
Inspect preserved source fields

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

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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 floss →

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
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Import run
73216b9a9b78ed3830994bf853103716f5a4dc57099e371e9f8fdc468facca26
Permanent entry ID
w-Zmxvc3M