Etymograph

English

lumbar

Lumbar comes from Latin lumbus ‘loin’, and goes back to Proto-Indo-European *lendʰ- ‘to enter, penetrate, expand’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*lendʰ-1‘to enter, penetrate, expand’reconstructed
  2. Latinc. 75 BCE–200 CElumbus2‘loin’
  3. Latinc. 75 BCE–200 CElumbāris2
  4. Englishearliest quotation 1905lumbar2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin lumbus
  2. 2 Wiktionary, English lumbar
  3. Earliest quotation in Wiktionary’s entry: 1905, Robert W. Lovett, The mechanism of the normal spine and its relation to scolio: “The first lumbar moved between the erect position and…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*lendʰ-Wiktionary, Latin lumbus‘to enter, penetrate, expand’reconstructed
  2. Latinc. 75 BCE–200 CElumbusWiktionary, English lumbar‘loin’
  3. Latinc. 75 BCE–200 CElumbārisWiktionary, English lumbar
  4. Englishearliest quotation 1905lumbarWiktionary, English lumbar. Earliest quotation in Wiktionary’s entry: 1905, Robert W. Lovett, The mechanism of the normal spine and its relation to scolio: “The first lumbar moved between the erect position and…”

Linked words

through Proto-Indo-European *lendʰ- ‘to enter, penetrate, expand’

land, lawn, lend, lasagna, lomas, 10 more

through Latin lumbus ‘loin’

loma, loin, 5 more

Today it means

adj Related to the lower back or loin, specifically the five vertebrae between the rib cage and the pelvis.

Sources

Sources: Wiktionary, “lumbar”; the older steps come from the Wiktionary entry for Latin lumbus. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *lendʰ- / lumbar

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