*SET-U

English word origin

Etymology of flank

From Late Middle English flanc, from Late Old English flanc (“flank”), from Old French flanc, of Germanic origin, probably Frankish *hlanca, from Proto-West Germanic *hlanku (“bend, curve, hip, flank”), from Proto-German

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 ↗
adj

Maximum. Historically faster than full speed (the most a vessel can sustain without excessive engine wear or risk of damage), now frequently used interchangeably. Typically used in an emergency or during an attack.

verb

To attack the flank(s) of. · To defend the flank(s) of. · To place to the side(s) of. · To be placed to the side(s) of something (usually in terms of two objects, one on each side).

noun

The lateral flesh between the last rib and the hip. · A cut of meat from the flank of an animal. · The extreme left or right edge of a military formation, army etc. · The sides of a bastion perpendicular to the wall from which the bastion projects.

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

From Late Middle English flanc, from Late Old English flanc (“flank”), from Old French flanc, of Germanic origin, probably Frankish *hlanca, from Proto-West Germanic *hlanku (“bend, curve, hip, flank”), from Proto-Germanic *hlankaz (“flexible, sleek, bendsome”), from Proto-Indo-European *kleng- (“to bend”). Akin to Old High German hlanca (“loin”), Middle Low German lanke (“hip joint”) (German lenken (“to bend, turn, lead”)), Old English hlanc (“loose, slender, flaccid, lank”). More at lank.

Relationships mentioned by the source

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

  • Inherited-form mentionflancenm
  • Inherited-form mentionflancang · flank
  • Derivation mentionflancfro
  • Derivation mention*hlankugmw-pro · bend, curve, hip, flank
  • Derivation mention*hlankazgem-pro · flexible, sleek, bendsome
  • Derivation mention*kleng-ine-pro · to bend
  • Cognate mentionhlancagoh
  • Cognate mentionlankegml
  • Cognate mentionhlancang

This page abbreviates 6 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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      },
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        "3": "flanc",
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      "expansion": "Old English flanc (“flank”)"
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        "t": "bend, curve, hip, flank"
      },
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    },
    {
      "name": "der",
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        "3": "",
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      "expansion": "Old High German hlanca (“loin”)"
    },
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      "name": "cog",
      "args": {
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      },
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    },
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        "2": "hlanc",
        "3": "",
        "4": "loose, slender, flaccid, lank"
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      "Reconstruction:Proto-Germanic/hlankaz"
    ],
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      "Reconstruction:Proto-Indo-European/kleng-"
    ],
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        "To place to the side(s) of.",
        "To be placed to the side(s) of something (usually in terms of two objects, one on each side)."
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        "The sides of a bastion perpendicular to the wall from which the bastion projects."
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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 flank →

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-Zmxhbms