*SET-U

English word origin

Etymology of os

Unadapted borrowing from Latin os (“bone”).

4 source sectionsExtended source reportWiktionary original ↗
In this entry · 4 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 ↗
noun

Synonym of bone.

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

Unadapted borrowing from Latin os (“bone”).

Inspect preserved source fields

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

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    {
      "name": "ety",
      "args": {
        "1": "en",
        "2": ":ubor",
        "3": "la:os<id:bone><t:bone>",
        "id": "bone",
        "text": "+",
        "tree": "1"
      },
      "expansion": "[Appendix:Glossary#unadapted_borrowing|Unadapted borrowing]] from\", \"terms\" : [ { \"id\" : \"bone\", \"children\" : [ ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"os\", \"gloss\" : \"bone\", \"lang\" : \"la\" } ], \"keyword\" : \"ubor\" } ], \"status\" : \"ok\", \"lang_name\" : \"English\", \"term\" : \"os\", \"lang\" : \"en\" }\" data-id=\"bone\" data-lang=\"en\" data-title=\"os\" id=\"English:_bone\">\nUnadapted borrowing from Latin os (“bone”)."
    },
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        "2": ":ubor",
        "3": "la:os<id:bone><t:bone>",
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      },
      "expansion": "Unadapted borrowing from Latin os (“bone”)."
    }
  ],
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    [
      "os",
      "os#Latin:_bone"
    ]
  ],
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  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Synonym of bone."
      ],
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Source etymology 2

Original entry ↗
noun

An opening or entrance to a passage, particularly one at either end of the cervix, internal (to the uterus) or external (to the vagina).

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

Etymology tree Proto-Indo-European *h₁óh₃s Proto-Italic *ōs Latin ōsubor. English os Unadapted borrowing from Latin ōs (“mouth”).

Inspect preserved source fields

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

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    {
      "name": "ety",
      "args": {
        "1": "en",
        "2": ":ubor",
        "3": "la:ōs<id:mouth><t:mouth>",
        "id": "mouth",
        "text": "+",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *h₁óh₃s\nProto-Italic *ōs\nLatin ōsubor.\nEnglish os\n[Appendix:Glossary#unadapted_borrowing|Unadapted borrowing]] from\", \"terms\" : [ { \"id\" : \"mouth\", \"children\" : [ { \"terms\" : [ { \"children\" : [ { \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Proto-Indo-European\", \"term\" : \"*h₁óh₃s\", \"status\" : \"ok\", \"lang\" : \"ine-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Proto-Italic\", \"term\" : \"*ōs\", \"status\" : \"ok\", \"lang\" : \"itc-pro\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"status\" : \"ok\", \"lang_name\" : \"Latin\", \"term\" : \"ōs\", \"gloss\" : \"mouth\", \"lang\" : \"la\" } ], \"keyword\" : \"ubor\" } ], \"status\" : \"ok\", \"lang_name\" : \"English\", \"term\" : \"os\", \"lang\" : \"en\" }\" data-id=\"mouth\" data-lang=\"en\" data-title=\"os\" id=\"English:_mouth\">\nUnadapted borrowing from Latin ōs (“mouth”)."
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        "3": "la:ōs<id:mouth><t:mouth>",
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    }
  ],
  "links": [
    [
      "*h₁óh₃s",
      "Reconstruction:Proto-Indo-European/h₁óh₃s"
    ],
    [
      "*ōs",
      "Reconstruction:Proto-Italic/ōs"
    ],
    [
      "ōs",
      "os#Latin:_mouth"
    ],
    [
      "ōs",
      "os#Latin:_mouth"
    ]
  ],
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      "glosses": [
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        "sometimes"
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Source etymology 3

Original entry ↗
noun

An osar or esker.

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

Unadapted borrowing from Swedish ås. Doublet of ose and osar /asar (when used as a singular).

Inspect preserved source fields

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

{
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    {
      "name": "ety",
      "args": {
        "1": "en",
        "2": ":ubor",
        "3": "sv:ås",
        "id": "esker",
        "text": "+",
        "tree": "1",
        "doublet": "ose,osar//asar<ng:when used as a singular>"
      },
      "expansion": "[Appendix:Glossary#unadapted_borrowing|Unadapted borrowing]] from\", \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Swedish\", \"term\" : \"ås\", \"status\" : \"missing\", \"lang\" : \"sv\" } ], \"keyword\" : \"ubor\" } ], \"status\" : \"ok\", \"lang_name\" : \"English\", \"term\" : \"os\", \"lang\" : \"en\" }\" data-id=\"esker\" data-lang=\"en\" data-title=\"os\" id=\"English:_esker\">\nUnadapted borrowing from Swedish ås. Doublet of ose and osar /asar (when used as a singular)."
    },
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        "3": "sv:ås",
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        "tree": "1",
        "doublet": "ose,osar//asar<ng:when used as a singular>"
      },
      "expansion": "Unadapted borrowing from Swedish ås. Doublet of ose and osar /asar (when used as a singular)."
    }
  ],
  "links": [
    [
      "ås",
      "ås#Swedish"
    ],
    [
      "ose",
      "ose#English"
    ],
    [
      "osar",
      "osar#English"
    ],
    [
      "asar",
      "asar#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "An osar or esker."
      ],
      "tags": [],
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Source etymology 4

Original entry ↗
noun

Alternative form of o's.

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

From o + -s.

Inspect preserved source fields

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

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        "3": "o",
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        "text": "+",
        "tree": "1"
      },
      "expansion": "From o + -s."
    },
    {
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        "2": ":af",
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        "tree": "1"
      },
      "expansion": "From o + -s."
    }
  ],
  "links": [
    [
      "o",
      "o#English"
    ],
    [
      "-s",
      "-s#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Alternative form of o's."
      ],
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        "alt-of",
        "alternative",
        "rare"
      ],
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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 os →

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-b3M