*SET-U

English word origin

Etymology of filth

From Middle English filth, from Old English fȳlþu, from Proto-West Germanic *fūliþu, equivalent to foul + -th (abstract nominal suffix).

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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

The police.

noun

Dirt; foul matter; that which soils or defiles. · Smut; that which sullies or defiles the moral character; corruption; pollution. · A vile or disgusting person. · Weeds growing on pasture land.

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

From Middle English filth, from Old English fȳlþu, from Proto-West Germanic *fūliþu, equivalent to foul + -th (abstract nominal suffix).

Relationships mentioned by the source

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

  • Root classification mention*puH-ine-pro
  • Inherited-form mentionfilthenm
  • Inherited-form mentionfȳlþuang
  • Inherited-form mention*fūliþugmw-pro
Inspect preserved source fields

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

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        "2": "enm",
        "3": "filth"
      },
      "expansion": "Middle English filth"
    },
    {
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      "args": {
        "1": "en",
        "2": "ang",
        "3": "fȳlþu"
      },
      "expansion": "Old English fȳlþu"
    },
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      },
      "expansion": "Proto-West Germanic *fūliþu"
    },
    {
      "name": "suffix",
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        "2": "foul",
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      },
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    }
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    ],
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    [
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      "Reconstruction:Proto-West Germanic/fūliþu"
    ],
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      "foul",
      "foul#English"
    ],
    [
      "-th",
      "-th#English:_abstract_nominal"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "The police."
      ],
      "tags": [
        "Ireland",
        "UK",
        "derogatory",
        "slang",
        "uncountable"
      ],
      "recordId": "31cc5d29ff72d6d281689c2c8ca7173883dc07d13515c1b5a37ccb68e407227f",
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      "sourceRecordOrdinal": 193030
    },
    {
      "pos": "noun",
      "glosses": [
        "Dirt; foul matter; that which soils or defiles.",
        "Smut; that which sullies or defiles the moral character; corruption; pollution.",
        "A vile or disgusting person.",
        "Weeds growing on pasture land."
      ],
      "tags": [
        "uncountable",
        "usually",
        "derogatory",
        "US",
        "dated"
      ],
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      "sourceRecordOrdinal": 193029
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  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
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    "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 filth →

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-ZmlsdGg