*SET-U

English word origin

Etymology of scum

From Middle English scum, scome, skum, skome, scumme, from Middle Low German or Middle Dutch schūme (“foam”), from Old Dutch *scūm, from Frankish *skūm, from Proto-Germanic *skūmaz (“froth, foam”), from Proto-Indo-Europe

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 layer of impurities that accumulates at the surface of a liquid (especially molten metal or water). · A greenish water vegetation (such as algae), usually found floating on the surface of ponds · The topmost liquid layer of a cesspool or septic tank. · Semen.

verb

To remove the layer of scum from (a liquid etc.). · To remove (something) as scum. · To become covered with scum. · To scour (the land, sea, etc.).

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

From Middle English scum, scome, skum, skome, scumme, from Middle Low German or Middle Dutch schūme (“foam”), from Old Dutch *scūm, from Frankish *skūm, from Proto-Germanic *skūmaz (“froth, foam”), from Proto-Indo-European *(s)kewH- (“to cover, conceal”). Cognate with Dutch schuim (“foam”), West Frisian skuum, German Schaum (“foam”), Danish and Swedish skum (“foam”). Compare also French écume (“scum”), Italian schiuma (“foam”), Saterland Frisian Skuum, Sicilian scuma (“foam”), Walloon schome (“scum, foam”), Lithuanian šamas (“catfish”) and skanus (“tasty”) from the same Germanic source. Related to skim.

Relationships mentioned by the source

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

  • Inherited-form mentionscumenm
  • Derivation mentionschūmedum · foam
  • Derivation mention*scūmodt
  • Derivation mention*skūmazgem-pro · froth, foam
  • Derivation mention*(s)kewH-ine-pro · to cover, conceal
  • Cognate mentionschuimnl · foam
  • Cognate mentionskuumfy
  • Cognate mentionSchaumde · foam
  • Cognate mentionécumefr · scum
  • Cognate mentionschiumait · foam
  • Cognate mentionSkuumstq
  • Cognate mentionscumascn · foam
  • Cognate mentionschomewa · scum, foam
  • Cognate mentionšamaslt · catfish

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.

{
  "templates": [
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "scum"
      },
      "expansion": "Middle English scum"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gml",
        "3": "-"
      },
      "expansion": "Middle Low German"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "dum",
        "3": "schūme",
        "t": "foam"
      },
      "expansion": "Middle Dutch schūme (“foam”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "odt",
        "3": "*scūm"
      },
      "expansion": "Old Dutch *scūm"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "frk",
        "3": "*skūm"
      },
      "expansion": "Frankish *skūm"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*skūmaz",
        "t": "froth, foam"
      },
      "expansion": "Proto-Germanic *skūmaz (“froth, foam”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*(s)kewH-",
        "t": "to cover, conceal"
      },
      "expansion": "Proto-Indo-European *(s)kewH- (“to cover, conceal”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "schuim",
        "t": "foam"
      },
      "expansion": "Dutch schuim (“foam”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "fy",
        "2": "skuum"
      },
      "expansion": "West Frisian skuum"
    },
    {
      "name": "cog",
      "args": {
        "1": "de",
        "2": "Schaum",
        "t": "foam"
      },
      "expansion": "German Schaum (“foam”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "da",
        "2": "-"
      },
      "expansion": "Danish"
    },
    {
      "name": "cog",
      "args": {
        "1": "sv",
        "2": "-"
      },
      "expansion": "Swedish"
    },
    {
      "name": "cog",
      "args": {
        "1": "fr",
        "2": "écume",
        "t": "scum"
      },
      "expansion": "French écume (“scum”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "it",
        "2": "schiuma",
        "t": "foam"
      },
      "expansion": "Italian schiuma (“foam”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "stq",
        "2": "Skuum"
      },
      "expansion": "Saterland Frisian Skuum"
    },
    {
      "name": "cog",
      "args": {
        "1": "scn",
        "2": "scuma",
        "t": "foam"
      },
      "expansion": "Sicilian scuma (“foam”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "wa",
        "2": "schome",
        "t": "scum, foam"
      },
      "expansion": "Walloon schome (“scum, foam”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "lt",
        "2": "šamas",
        "t": "catfish"
      },
      "expansion": "Lithuanian šamas (“catfish”)"
    }
  ],
  "links": [
    [
      "scum",
      "scum#Middle_English"
    ],
    [
      "scome",
      "scome#Middle_English"
    ],
    [
      "skum",
      "skum#Middle_English"
    ],
    [
      "skome",
      "skome#Middle_English"
    ],
    [
      "scumme",
      "scumme#Middle_English"
    ],
    [
      "schūme",
      "schume#Middle_Dutch"
    ],
    [
      "*scūm",
      "Reconstruction:Old Dutch/scum"
    ],
    [
      "*skūm",
      "Reconstruction:Proto-West Germanic/skūm"
    ],
    [
      "*skūmaz",
      "Reconstruction:Proto-Germanic/skūmaz"
    ],
    [
      "*(s)kewH-",
      "Reconstruction:Proto-Indo-European/(s)kewH-"
    ],
    [
      "schuim",
      "schuim#Dutch"
    ],
    [
      "skuum",
      "skuum#West_Frisian"
    ],
    [
      "Schaum",
      "Schaum#German"
    ],
    [
      "skum",
      "skum#Danish"
    ],
    [
      "écume",
      "écume#French"
    ],
    [
      "schiuma",
      "schiuma#Italian"
    ],
    [
      "Skuum",
      "Skuum#Saterland_Frisian"
    ],
    [
      "scuma",
      "scuma#Sicilian"
    ],
    [
      "schome",
      "schome#Walloon"
    ],
    [
      "šamas",
      "šamas#Lithuanian"
    ],
    [
      "skanus",
      "skanus#Lithuanian"
    ],
    [
      "skim",
      "skim#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "A layer of impurities that accumulates at the surface of a liquid (especially molten metal or water).",
        "A greenish water vegetation (such as algae), usually found floating on the surface of ponds",
        "The topmost liquid layer of a cesspool or septic tank.",
        "Semen."
      ],
      "tags": [
        "uncountable",
        "countable",
        "US",
        "slang"
      ],
      "recordId": "887d77d01118416c0a5e1ff5618820261fe43746d05fac65507fdb56240737c8",
      "rawRecordSha256": "88b5d5398d77a665d725460cb28375163cd1139d460aab0c9cc70630de436d9e",
      "sourceRecordOrdinal": 169110
    },
    {
      "pos": "verb",
      "glosses": [
        "To remove the layer of scum from (a liquid etc.).",
        "To remove (something) as scum.",
        "To become covered with scum.",
        "To scour (the land, sea, etc.)."
      ],
      "tags": [
        "obsolete"
      ],
      "recordId": "a8fbab7cdb1513aa55de62854f786fc59d91c185b26e84f6c28807d78930bd90",
      "rawRecordSha256": "034c8d1712cb3256b536573d0bfef2ea2076f588fdfab4380f4fc3e6f2c899b4",
      "sourceRecordOrdinal": 169111
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 3,
    "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 scum →

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-c2N1bQ