*SET-U

English word origin

Etymology of semi

The prefix semi- (from Latin) used as a noun.

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 ↗
adv

Somewhat; to some extent.

noun

A semi-detached house. · A semi-trailer; a tractor-trailer; an eighteen-wheeler; an artic. · A semifinal. · A partial erection of the penis.

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

The prefix semi- (from Latin) used as a noun.

Relationships mentioned by the source

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

  • Root classification mention*sem-ine-pro

This page abbreviates 3 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.

{
  "templates": [
    {
      "name": "root",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*sem-"
      },
      "expansion": ""
    }
  ],
  "links": [
    [
      "semi-",
      "semi-#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "adv",
      "glosses": [
        "Somewhat; to some extent."
      ],
      "tags": [
        "informal",
        "not-comparable"
      ],
      "recordId": "55c437decd8694d403f48e3b85ec01465bafdafafdcff4d4fa0b7c0e49143e10",
      "rawRecordSha256": "9cfbe6e9a5ed4cc5168cfe695291c81cb9871a80b86017a2b5c82d3d6499cbce",
      "sourceRecordOrdinal": 165883
    },
    {
      "pos": "noun",
      "glosses": [
        "A semi-detached house.",
        "A semi-trailer; a tractor-trailer; an eighteen-wheeler; an artic.",
        "A semifinal.",
        "A partial erection of the penis."
      ],
      "tags": [
        "Australia",
        "Canada",
        "Ireland",
        "UK",
        "informal",
        "New-Zealand",
        "US",
        "slang"
      ],
      "recordId": "abf8f5ab08a94f5d5931d63af91f33221168858559a64524509bb4e229e4d3e8",
      "rawRecordSha256": "bc0cd5f5bc22ba99c6910e88d3ef2ef9ea0d0a6dfe97f7cabc51060b9929964a",
      "sourceRecordOrdinal": 165882
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 3,
    "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 semi →

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-c2VtaQ