*SET-U

English word origin

Etymology of crux

Borrowed from Latin crux (“cross, wooden frame for execution”), possibly from the Proto-Indo-European *(s)ker- (“to turn, to bend”). Doublet of cross and crouch (“cross”).

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.

Unnumbered source etymology

Original entry ↗
noun

The basic, central, or essential point or feature. · The critical or transitional moment or issue, a turning point. · A puzzle or difficulty. · The hardest point of a climb.

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

Borrowed from Latin crux (“cross, wooden frame for execution”), possibly from the Proto-Indo-European *(s)ker- (“to turn, to bend”). Doublet of cross and crouch (“cross”).

Relationships mentioned by the source

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

This page abbreviates 1 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": "root",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*(s)ker- (turn)"
      },
      "expansion": ""
    },
    {
      "name": "bor+",
      "args": {
        "1": "en",
        "2": "la",
        "3": "crux",
        "4": "",
        "5": "cross, wooden frame for execution"
      },
      "expansion": "Borrowed from Latin crux (“cross, wooden frame for execution”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*(s)ker-",
        "4": "",
        "5": "to turn, to bend"
      },
      "expansion": "Proto-Indo-European *(s)ker- (“to turn, to bend”)"
    },
    {
      "name": "doublet",
      "args": {
        "1": "en",
        "2": "cross",
        "3": "crouch",
        "t2": "cross"
      },
      "expansion": "Doublet of cross and crouch (“cross”)"
    }
  ],
  "links": [
    [
      "crux",
      "crux#Latin"
    ],
    [
      "*(s)ker-",
      "Reconstruction:Proto-Indo-European/(s)ker-"
    ],
    [
      "cross",
      "cross#English"
    ],
    [
      "crouch",
      "crouch#English"
    ]
  ],
  "references": [],
  "descendants": [
    {
      "lang": "French",
      "lang_code": "fr",
      "word": "crux",
      "raw_tags": [
        "borrowed"
      ]
    }
  ],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "The basic, central, or essential point or feature.",
        "The critical or transitional moment or issue, a turning point.",
        "A puzzle or difficulty.",
        "The hardest point of a climb."
      ],
      "tags": [],
      "recordId": "1cb318f5086add19a6630fdc34af07af5e91231a9ddfcc90fda4b1a58ab1c05f",
      "rawRecordSha256": "ffced0f555450bfbaf9a109edf5558385937d65b01e48c3ade22fa98212d5a27",
      "sourceRecordOrdinal": 229054
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 1,
    "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 crux →

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-Y3J1eA