Etymograph

English

plantigrade

Plantigrade comes from Latin planta ‘sole of the foot’, and goes back to Proto-Indo-European *pleh₂- ‘flat’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*pleh₂-1‘flat’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*pléh₂-n̥t-eh₂1reconstructed
  3. Proto-Italicc. 1500–700 BCE*plāntā2reconstructed
  4. Latinc. 75 BCE–200 CEplanta1‘sole of the foot’
  5. Frenchc. 1600–presentplantigrade1
  6. Englishtodayplantigrade1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English plantigrade
  2. 2 Wiktionary, Latin planta

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*pleh₂-Wiktionary, English plantigrade‘flat’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*pléh₂-n̥t-eh₂Wiktionary, English plantigradereconstructed
  3. Proto-Italicc. 1500–700 BCE*plāntāWiktionary, Latin plantareconstructed
  4. Latinc. 75 BCE–200 CEplantaWiktionary, English plantigrade‘sole of the foot’
  5. Frenchc. 1600–presentplantigradeWiktionary, English plantigrade
  6. EnglishtodayplantigradeWiktionary, English plantigrade

Linked words

through Proto-Indo-European *pleh₂- ‘flat’

field, floor, explain, palm, plane, plain, explanation, archipelago, fluke, parma, explanatory, playa, placenta, flounder, planar, lech, palatine, placate, polonium, pelagic, implacable, flay, veld, floe, esplanade, purdah, llano, 50 more

through Latin planta ‘sole of the foot’

clan, implant, 8 more

Today it means

adj Of an animal: walking with the entire sole of the foot on the ground.

Sources

Sources: Wiktionary, “plantigrade”; the older steps come from the Wiktionary entry for Latin planta. 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 *pleh₂- / plantigrade

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