*SET-U

English word origin

Etymology of eth-

Etymology tree Proto-Indo-European *h₂eydʰ-der. Proto-Hellenic *áitʰō Ancient Greek αἴθω (aíthō) ▲ Ancient Greek ᾱ̓ήρ (āḗr)influ.? Ancient Greek αἰθήρ (aithḗr)der. Latin aethērbor. German Äther German Ether Proto-Indo-Eu

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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

Used as a combining form to denote the presence of 2 carbon atoms in the parent chain when forming names of organic compounds.

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

Etymology tree Proto-Indo-European *h₂eydʰ-der. Proto-Hellenic *áitʰō Ancient Greek αἴθω (aíthō) ▲ Ancient Greek ᾱ̓ήρ (āḗr)influ.? Ancient Greek αἰθήρ (aithḗr)der. Latin aethērbor. German Äther German Ether Proto-Indo-European *swel-der.? Ancient Greek ῡ̔́λη (hū́lē)der. German -yl German Ethylbor. English ethyl English eth- From ethyl. Ultimately from Ancient Greek αἰθήρ (aithḗr, “ether”).

Relationships mentioned by the source

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

Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": "ethyl",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂eydʰ-der.\nProto-Hellenic *áitʰō\nAncient Greek αἴθω (aíthō)\n▲\nAncient Greek ᾱ̓ήρ (āḗr)influ.?\nAncient Greek αἰθήρ (aithḗr)der.\nLatin aethērbor.\nGerman Äther\nGerman Ether\nProto-Indo-European *swel-der.?\nAncient Greek ῡ̔́λη (hū́lē)der.\nGerman -yl\nGerman Ethylbor.\nEnglish ethyl\nEnglish eth-\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"bor.\", \"keyword_label\" : \"Borrowed from\", \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"gloss\" : \"sky; ether\", \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₂eydʰ-\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Proto-Hellenic\", \"term\" : \"*áitʰō\", \"status\" : \"ok\", \"lang\" : \"grk-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Ancient Greek\", \"term\" : \"αἴθω\", \"status\" : \"ok\", \"lang\" : \"grc\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" }, { \"keyword_abbrev\" : \"influ.\", \"is_uncertain\" : true, \"keyword_label\" : \"Influenced by\", \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Ancient Greek\", \"term\" : \"ᾱ̓ήρ\", \"status\" : \"ok\", \"lang\" : \"grc\" } ], \"keyword\" : \"influence\" } ], \"lang_name\" : \"Ancient Greek\", \"term\" : \"αἰθήρ\", \"status\" : \"ok\", \"lang\" : \"grc\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Latin\", \"term\" : \"aethēr\", \"status\" : \"ok\", \"lang\" : \"la\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"German\", \"term\" : \"Äther\", \"status\" : \"ok\", \"lang\" : \"de\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"German\", \"term\" : \"Ether\", \"status\" : \"ok\", \"lang\" : \"de\" }, { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"der.\", \"keyword_label\" : \"Derived from\", \"terms\" : [ { \"is_uncertain\" : true, \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*swel-\", \"status\" : \"missing\", \"lang\" : \"ine-pro\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"Ancient Greek\", \"term\" : \"ῡ̔́λη\", \"status\" : \"ok\", \"lang\" : \"grc\" } ], \"keyword\" : \"derived\" } ], \"lang_name\" : \"German\", \"term\" : \"-yl\", \"status\" : \"ok\", \"lang\" : \"de\" } ], \"keyword_label\" : \"From\", \"is_group\" : true, \"keyword\" : \"affix\" } ], \"lang_name\" : \"German\", \"term\" : \"Ethyl\", \"status\" : \"ok\", \"lang\" : \"de\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"English\", \"term\" : \"ethyl\", \"status\" : \"ok\", \"lang\" : \"en\" } ], \"keyword_label\" : \"From\", \"keyword\" : \"from\" } ], \"lang_name\" : \"English\", \"term\" : \"eth-\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"eth-\">"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "grc",
        "3": "αἰθήρ",
        "t": "ether"
      },
      "expansion": "Ancient Greek αἰθήρ (aithḗr, “ether”)"
    },
    {
      "name": "etymon",
      "args": {
        "1": "en",
        "2": "ethyl",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₂eydʰ-der.\nProto-Hellenic *áitʰō\nAncient Greek αἴθω (aíthō)\n▲\nAncient Greek ᾱ̓ήρ (āḗr)influ.?\nAncient Greek αἰθήρ (aithḗr)der.\nLatin aethērbor.\nGerman Äther\nGerman Ether\nProto-Indo-European *swel-der.?\nAncient Greek ῡ̔́λη (hū́lē)der.\nGerman -yl\nGerman Ethylbor.\nEnglish ethyl\nEnglish eth-"
    }
  ],
  "links": [
    [
      "*h₂eydʰ-",
      "Reconstruction:Proto-Indo-European/h₂eydʰ-"
    ],
    [
      "*áitʰō",
      "Reconstruction:Proto-Hellenic/áitʰō"
    ],
    [
      "αἴθω",
      "αἴθω#Ancient_Greek"
    ],
    [
      "ᾱ̓ήρ",
      "ἀήρ#Ancient_Greek"
    ],
    [
      "αἰθήρ",
      "αἰθήρ#Ancient_Greek"
    ],
    [
      "aethēr",
      "aether#Latin"
    ],
    [
      "Äther",
      "Äther#German"
    ],
    [
      "Ether",
      "Ether#German"
    ],
    [
      "*swel-",
      "Reconstruction:Proto-Indo-European/swel-"
    ],
    [
      "ῡ̔́λη",
      "ὕλη#Ancient_Greek"
    ],
    [
      "-yl",
      "-yl#German"
    ],
    [
      "Ethyl",
      "Ethyl#German"
    ],
    [
      "ethyl",
      "ethyl#English"
    ],
    [
      "ethyl",
      "ethyl#English"
    ],
    [
      "αἰθήρ",
      "αἰθήρ#Ancient_Greek"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "prefix",
      "glosses": [
        "Used as a combining form to denote the presence of 2 carbon atoms in the parent chain when forming names of organic compounds."
      ],
      "tags": [
        "morpheme"
      ],
      "recordId": "4d8971728966baf036637c75571980c5de24eaa854b1fdfcfdfb9e9e43fd0524",
      "rawRecordSha256": "8c0284dbb570d6c57e611637571ce602f0eff94ef125759ea9cdc0b13c0b5d7b",
      "sourceRecordOrdinal": 2173645
    }
  ],
  "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 eth- →

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-ZXRoLQ