English word origin

Etymology of 621

2 source sectionsExtended source reportWiktionary original ↗

In this entry · 2 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 ↗

name

e621.net, a chiefly pornographic furry booru digital art website. · 21 June (abbreviated 6/21 in the United States), as an occasion to celebrate the website by posting furry-related pornography (yiff) online.

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

The website name is a clipping of e621, using only the numbers in the name of the website. The website itself is from E621 (the E number for monosodium glutamate when used as a flavor enhancer) as an indirect reference to the service's content being tasty (“sexually appealing”). Compare the name of e621's work-safe mirror website, e926, which matches E926 (E number for the bleaching agent chlorine dioxide), perhaps as a reference to figurative eye bleach. The day is a direct reference to the website and based on 6/21, an abbreviation in the United States for 21 June.

Inspect preserved source fields

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

{
  "templates": [],
  "links": [
    [
      "clipping",
      "clipping"
    ],
    [
      "e621",
      "w:e621"
    ],
    [
      "E621",
      "E621#Translingual"
    ],
    [
      "E number",
      "E number"
    ],
    [
      "monosodium glutamate",
      "monosodium glutamate"
    ],
    [
      "flavor enhancer",
      "flavor enhancer"
    ],
    [
      "tasty",
      "tasty#English"
    ],
    [
      "work-safe",
      "work-safe"
    ],
    [
      "E926",
      "E926#Translingual"
    ],
    [
      "chlorine dioxide",
      "chlorine dioxide"
    ],
    [
      "eye bleach",
      "eye bleach"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "name",
      "glosses": [
        "e621.net, a chiefly pornographic furry booru digital art website.",
        "21 June (abbreviated 6/21 in the United States), as an occasion to celebrate the website by posting furry-related pornography (yiff) online."
      ],
      "tags": [
        "euphemistic",
        "slang",
        "sometimes",
        "rare"
      ],
      "recordId": "7dd8a77b109962b4195237d399942987b101021eca6a98bef7a56e75cb485113",
      "rawRecordSha256": "9d92903733b58751db56256964426c042239eb853347f2ca473ccf45a79e696a",
      "sourceRecordOrdinal": 9677443
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "glosses": 0
  }
}

Source etymology 2

Original entry ↗

noun

The 6-2-1 rule.

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

A shortening.

Inspect preserved source fields

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

{
  "templates": [],
  "links": [],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "The 6-2-1 rule."
      ],
      "tags": [
        "informal",
        "rare",
        "slang",
        "uncountable"
      ],
      "recordId": "bcb21209c64397920f5df7c9d3ccd74687804ea81b63c1b76d1fa944272ada8c",
      "rawRecordSha256": "d894acf90b4c0b2b6a9947cb44e3407087d23a5d3210fecd90b5926a2bf75a0f",
      "sourceRecordOrdinal": 9677444
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
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    "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 621 →

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-NjIx