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English word origin

Etymology of back-

From Middle English bak-, bac-, apheretic form of abak, aback (“aback”, adverb). See also aback.

1 source sectionBrief source recordWiktionary 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 ↗
prefix

Back in its adverbial senses. · Situated, located, or toward the rear; backward or in reverse; in return; again. · False; pseudo-.

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

From Middle English bak-, bac-, apheretic form of abak, aback (“aback”, adverb). See also aback.

Relationships mentioned by the source

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

  • Inherited-form mentionbak-enm
Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "bak-"
      },
      "expansion": "Middle English bak-"
    }
  ],
  "links": [
    [
      "bak-",
      "bak-#Middle_English"
    ],
    [
      "bac-",
      "bac-#Middle_English"
    ],
    [
      "abak",
      "abak#Middle_English"
    ],
    [
      "aback",
      "aback#Middle_English"
    ],
    [
      "aback",
      "aback#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "prefix",
      "glosses": [
        "Back in its adverbial senses.",
        "Situated, located, or toward the rear; backward or in reverse; in return; again.",
        "False; pseudo-."
      ],
      "tags": [
        "morpheme",
        "UK",
        "obsolete"
      ],
      "recordId": "f405e37acb5a340a7ea0f9deedab4451c5c275f9de8ab11920c11ab9951a09d8",
      "rawRecordSha256": "c69e7bd510cc9db4c45d1f4b8959cbe0c3c87ccd1ccc0ef868a2a7976ae2e311",
      "sourceRecordOrdinal": 3602188
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "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 back- →

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-YmFjay0