*SET-U

English word origin

Etymology of thy

From Middle English þi, apocopated variant of þin, from Old English þīn, from Proto-West Germanic *þīn, from Proto-Germanic *þīnaz, from Proto-Indo-European *téynos (“thy; thine”), from Proto-Indo-European *túh₂ (“thou”)

1 source sectionExtended source reportWiktionary 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.

Source etymology 1

Original entry ↗
det

Possessive form of thou: that which belongs to thee; which belongs to you (singular).

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

From Middle English þi, apocopated variant of þin, from Old English þīn, from Proto-West Germanic *þīn, from Proto-Germanic *þīnaz, from Proto-Indo-European *téynos (“thy; thine”), from Proto-Indo-European *túh₂ (“thou”). See thou.

Relationships mentioned by the source

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

  • Inherited-form mentionþienm
  • Inherited-form mentionþīnang
  • Inherited-form mention*þīngmw-pro
  • Inherited-form mention*þīnazgem-pro
  • Inherited-form mention*téynosine-pro · thy; thine
  • Derivation mention*túh₂ine-pro · thou
Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "þi"
      },
      "expansion": "Middle English þi"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ang",
        "3": "þīn"
      },
      "expansion": "Old English þīn"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gmw-pro",
        "3": "*þīn"
      },
      "expansion": "Proto-West Germanic *þīn"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "gem-pro",
        "3": "*þīnaz"
      },
      "expansion": "Proto-Germanic *þīnaz"
    },
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*téynos",
        "t": "thy; thine"
      },
      "expansion": "Proto-Indo-European *téynos (“thy; thine”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*túh₂",
        "t": "thou"
      },
      "expansion": "Proto-Indo-European *túh₂ (“thou”)"
    }
  ],
  "links": [
    [
      "þi",
      "þi#Middle_English"
    ],
    [
      "þin",
      "þin#Middle_English"
    ],
    [
      "þīn",
      "þin#Old_English"
    ],
    [
      "*þīn",
      "Reconstruction:Proto-West Germanic/þīn"
    ],
    [
      "*þīnaz",
      "Reconstruction:Proto-Germanic/þīnaz"
    ],
    [
      "*téynos",
      "Reconstruction:Proto-Indo-European/téynos"
    ],
    [
      "*túh₂",
      "Reconstruction:Proto-Indo-European/túh₂"
    ],
    [
      "thou",
      "thou#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "det",
      "glosses": [
        "Possessive form of thou: that which belongs to thee; which belongs to you (singular)."
      ],
      "tags": [
        "Early",
        "Modern",
        "archaic",
        "dialectal",
        "form-of",
        "literary",
        "possessive"
      ],
      "recordId": "d4666b129e8e4384b15e6524bda3b5c9c86fa6b2db758b0a211ba50f445c4a2a",
      "rawRecordSha256": "170f3fa5180af6284b0ebd8e6113930a1e4b241d9f61aa880b9a1bcb45f5c84c",
      "sourceRecordOrdinal": 32770
    }
  ],
  "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 thy →

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-dGh5