*SET-U

English word origin

Etymology of fen

From Middle English fen, fenne, from Old English fenn (“fen; marsh; mud; dirt”), Proto-West Germanic *fani, from Proto-Germanic *fanją, from Proto-Indo-European *pen- (“bog, mire”). See also West Frisian fean, Dutch veen

6 source sectionsExtended source reportWiktionary original ↗
In this entry · 6 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 type of wetland fed by ground water and runoff, containing peat below the waterline, characteristically alkaline. · Any swamp or mire (especially with negative connotations).

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

From Middle English fen, fenne, from Old English fenn (“fen; marsh; mud; dirt”), Proto-West Germanic *fani, from Proto-Germanic *fanją, from Proto-Indo-European *pen- (“bog, mire”). See also West Frisian fean, Dutch veen, German Fenn, Norwegian fen; also Middle Irish en (“water”), enach (“swamp”), Old Prussian pannean (“peat-bog”), Sanskrit पङ्क (paṅka, “marsh, mud, mire, slough”).

Relationships mentioned by the source

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

  • Inherited-form mentionfenenm
  • Inherited-form mentionfennang · fen; marsh; mud; dirt
  • Inherited-form mention*fanigmw-pro
  • Inherited-form mention*fanjągem-pro
  • Derivation mention*pen-ine-pro · bog, mire
  • Cognate mentionfeanfy
  • Cognate mentionveennl
  • Cognate mentionFennde
  • Cognate mentionfenno
  • Cognate mentionenmga · water
  • Cognate mentionpanneanprg · peat-bog
  • Cognate mentionपङ्कsa · marsh, mud, mire, slough
Inspect preserved source fields

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

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    },
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    },
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        "1": "mga",
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      "expansion": "Middle Irish en (“water”)"
    },
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    }
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      "fenn#Old_English"
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    ],
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      "Reconstruction:Proto-Germanic/fanją"
    ],
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    ],
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    ],
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      "veen",
      "veen#Dutch"
    ],
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      "Fenn#German"
    ],
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      "fen#Norwegian"
    ],
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      "en#Middle_Irish"
    ],
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      "enach#Middle_Irish"
    ],
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Source etymology 2

Original entry ↗
noun

A unit of currency in China, one-hundredth of a yuan.

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

From Chinese 分 (fēn). Doublet of hoon and fan.

Relationships mentioned by the source

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

  • Borrowed-form mention分zh
  • Doublet mentionhoonen
  • Doublet mentionfanen
Inspect preserved source fields

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

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Source etymology 3

Original entry ↗
noun

a plural of fan used by enthusiasts of science fiction, fantasy, and anime, partly from whimsy and partly to distinguish themselves from fans of sport, etc.

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

From fan, by analogy with men as the plural of man.

Inspect preserved source fields

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

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Source etymology 4

Original entry ↗
noun

A fennec fox.

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

Clipping of fennec (“a small fox of the species Vulpes zerda, found in the Sahara (excluding the coast) and having distinctive oversized ears.”).

Inspect preserved source fields

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

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Source etymology 5

Original entry ↗
intj

Used in children's games to prevent or forestall another player's action; a check or bar.

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

Compare fend.

Inspect preserved source fields

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

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Source etymology 6

Original entry ↗
noun

A kind of mildew that grows on hops.

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

From Middle English *vene, Kentish variant of *fine, from Old English fyne (“moisture, mold, mildew”), from Proto-Germanic *funiz, *fun- (“moisture, mold”); compare vinew.

Relationships mentioned by the source

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

  • Inherited-form mention*veneenm
  • Inherited-form mentionfyneang · moisture, mold, mildew
  • Inherited-form mention*funizgem-pro
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 fen →

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-ZmVu