*SET-U

English word origin

Etymology of plumb

From Middle English plumbe, plumme, from Old French *plombe, from Latin plumba, plural of plumbum.

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.

Source etymology 1

Original entry ↗
verb

To determine the depth, generally of a liquid; to sound. · To attach to a water supply and drain. · To think about or explore in depth, to get to the bottom of. · To use a plumb bob as a measuring or aligning tool.

adj

Truly vertical, as indicated by a plumb line. · Describing an LBW where the batsman is hit on the pads directly in front of their wicket and should be given out.

noun

A little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction. · A weight on the end of a long line, used by sailors to determine the depth of water. · The perpendicular direction or position.

adv

In a vertical direction; perpendicularly. · Squarely, directly; deeply, completely.

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

From Middle English plumbe, plumme, from Old French *plombe, from Latin plumba, plural of plumbum.

Relationships mentioned by the source

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

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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    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "plumbe"
      },
      "expansion": "Middle English plumbe"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "fro",
        "3": "*plombe"
      },
      "expansion": "Old French *plombe"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "la",
        "3": "plumba"
      },
      "expansion": "Latin plumba"
    }
  ],
  "links": [
    [
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    ],
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    ],
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      "Reconstruction:Old French/plombe"
    ],
    [
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    ],
    [
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      "plumbum#Latin"
    ]
  ],
  "references": [],
  "descendants": [],
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        "To determine the depth, generally of a liquid; to sound.",
        "To attach to a water supply and drain.",
        "To think about or explore in depth, to get to the bottom of.",
        "To use a plumb bob as a measuring or aligning tool."
      ],
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        "Truly vertical, as indicated by a plumb line.",
        "Describing an LBW where the batsman is hit on the pads directly in front of their wicket and should be given out."
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        "A little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction.",
        "A weight on the end of a long line, used by sailors to determine the depth of water.",
        "The perpendicular direction or position."
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      "pos": "adv",
      "glosses": [
        "In a vertical direction; perpendicularly.",
        "Squarely, directly; deeply, completely."
      ],
      "tags": [
        "not-comparable",
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    "lexicalSenses": 6,
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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 plumb →

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-cGx1bWI