*SET-U

English word origin

Etymology of log

From Middle English logge, logg (first recorded in Anglo-Latin as loggum), of uncertain origin, but probably from Old Norse lóg, lág (“felled tree, log”), derived from Old Norse liggja (“to lie”). If so, then cognate wit

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 ↗
verb

To cut trees into logs. · To cut down (trees). · To cut down trees in an area, harvesting and transporting the logs as wood.

noun

The trunk of a dead tree, cleared of branches. · Any bulky piece as cut from the above, used as timber, fuel etc. · A unit of length equivalent to 16 feet, used for measuring timber, especially the trunk of a tree. · Any cylinder; anything shaped like a tree log, particularly

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

From Middle English logge, logg (first recorded in Anglo-Latin as loggum), of uncertain origin, but probably from Old Norse lóg, lág (“felled tree, log”), derived from Old Norse liggja (“to lie”). If so, then cognate with Norwegian låg (“fallen tree”), Dutch loog (“wood, timber, lumber”). Alternatively, directly from Norwegian låg (“fallen tree”), which could have been borrowed through the Norwegian timber trade. However the Old Norse/Middle Norwegian vowel is long while Middle English vowel is short.

Relationships mentioned by the source

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

  • Inherited-form mentionloggeenm
  • Derivation mentionlógnon
  • Derivation mentionliggjanon · to lie
  • Cognate mentionlågno · fallen tree
  • Cognate mentionloognl · wood, timber, lumber
  • Borrowed-form mentionlågno · fallen tree

This page abbreviates 7 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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Source etymology 2

Original entry ↗
verb

To make, to add an entry (or more) in a log or logbook. · To travel (a distance) as shown in a logbook. · To travel at a specified speed, as ascertained by a chip log.

noun

A logbook, or journal of a vessel's (or aircraft's) progress. · A chronological record of actions, performances, computer/network usage, etc. · Specifically, an append-only sequential record of events written to a file, display, or other data stream. · Logins, stolen login data.

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

Clipping of logbook, itself from log (etymology 1) + book, from a wooden float (chip log) used to measure speed.

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 ↗
verb

To log out; to disconnect from an online video game.

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

Ellipsis of log out, itself from Etymology 2.

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 ↗
verb

To move to and fro; to rock.

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

No narrative was extracted for this section. Available source templates and references appear below; no ancestor chain has been invented to fill the gap.

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 ↗
noun

A Hebrew unit of liquid volume (about ¹⁄₃ liter).

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

From Hebrew לֹג.

Relationships mentioned by the source

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

  • Unspecified derivation mentionלֹגhe
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

Synonym of logarithm. · A difference of one in the logarithm, usually in base 10; an order of magnitude.

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

A clipping of logarithm.

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 log →

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-bG9n