*SET-U

English word origin

Etymology of onset

From on- + set. Compare Old English onsettan (“to impose; oppress, bear down”). For semantic parallels for the meaning to assault, compare cognate Russian насе́сть pf (naséstʹ), наседа́ть impf (nasedátʹ).

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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 ↗
noun

The initial phase of a disease or condition, in which symptoms first become apparent. · The initial portion of a syllable, preceding the syllable nucleus. · The beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak. · A setting about; a beginning.

verb

To assault; to set upon. · To set about; to begin.

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

From on- + set. Compare Old English onsettan (“to impose; oppress, bear down”). For semantic parallels for the meaning to assault, compare cognate Russian насе́сть pf (naséstʹ), наседа́ть impf (nasedátʹ).

Relationships mentioned by the source

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

This page abbreviates 2 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": "af",
      "args": {
        "1": "en",
        "2": "on-",
        "3": "set"
      },
      "expansion": "on- + set"
    },
    {
      "name": "cog",
      "args": {
        "1": "ang",
        "2": "onsettan",
        "3": "",
        "4": "to impose; oppress, bear down"
      },
      "expansion": "Old English onsettan (“to impose; oppress, bear down”)"
    },
    {
      "name": "cog",
      "args": {
        "1": "ru",
        "2": "насе́сть",
        "g": "pf"
      },
      "expansion": "Russian насе́сть pf (naséstʹ)"
    }
  ],
  "links": [
    [
      "on-",
      "on-#English"
    ],
    [
      "set",
      "set#English"
    ],
    [
      "onsettan",
      "onsettan#Old_English"
    ],
    [
      "насе́сть",
      "насесть#Russian"
    ],
    [
      "наседа́ть",
      "наседать#Russian"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "The initial phase of a disease or condition, in which symptoms first become apparent.",
        "The initial portion of a syllable, preceding the syllable nucleus.",
        "The beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak.",
        "A setting about; a beginning."
      ],
      "tags": [
        "countable"
      ],
      "recordId": "45c54b23790c2f3a9429046dc8ef20ab07df8d1ea23c6781390324b8caedb423",
      "rawRecordSha256": "0e4b0149ff03fac7750cce9d2f4b1b79d0d5e066c49e70d1591445b71d7ad1fd",
      "sourceRecordOrdinal": 203615
    },
    {
      "pos": "verb",
      "glosses": [
        "To assault; to set upon.",
        "To set about; to begin."
      ],
      "tags": [
        "obsolete"
      ],
      "recordId": "7c074c242b59b37f2312967abc49517ddfd949113460b9afe6c94a40bbf356de",
      "rawRecordSha256": "7337d3f1fa6dae9fab7b4de80531b5f4edf91848e6b143c442742c833a77219e",
      "sourceRecordOrdinal": 203616
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 2,
    "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 onset →

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-b25zZXQ