Etymograph

English

amplitudinal

Amplitudinal comes from Latin amplitūdō ‘a wide extent’, from amplus ‘great, large, ample’, and ultimately from Proto-Indo-European *pleh₁- ‘to fill’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*pleh₁-1‘to fill’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*pl̥h₁nós1‘full’reconstructed
  3. Proto-Italicc. 1500–700 BCE*plēnos1‘full’reconstructed
  4. Latinc. 75 BCE–200 CEplēnus1‘full’uncertain
  5. Latinc. 75 BCE–200 CEambiplus1uncertain
  6. Latinc. 75 BCE–200 CEamplus1‘great, large, ample’
  7. Latinc. 75 BCE–200 CEamplitūdō2as amplitūdin-‘a wide extent’
  8. Englishtodayamplitudinal2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin amplitudo
  2. 2 Wiktionary, English amplitudinal

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*pleh₁-Wiktionary, Latin amplitudo‘to fill’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*pl̥h₁nósWiktionary, Latin amplitudo‘full’reconstructed
  3. Proto-Italicc. 1500–700 BCE*plēnosWiktionary, Latin amplitudo‘full’reconstructed
  4. Latinc. 75 BCE–200 CEplēnusWiktionary, Latin amplitudo‘full’uncertain
  5. Latinc. 75 BCE–200 CEambiplusWiktionary, Latin amplitudouncertain
  6. Latinc. 75 BCE–200 CEamplusWiktionary, Latin amplitudo‘great, large, ample’
  7. Latinc. 75 BCE–200 CEamplitūdōWiktionary, English amplitudinalas amplitūdin-‘a wide extent’
  8. EnglishtodayamplitudinalWiktionary, English amplitudinal

Linked words

through Proto-Indo-European *pleh₁- ‘to fill’

people, public, popular, complete, plus, supply, poll, folk, completion, implement, supplement, manipulation, comply, accomplish, complement, plural, plethora, depletion, puri, replete, volk, deplete, plebs, plebeian, 76 more

through Proto-Indo-European *pl̥h₁nós ‘full’

full, fill, fulsome, 22 more

through Latin plēnus ‘full’

plenty, plain, replenish, plenary, plenum, 16 more

through Latin amplus ‘great, large, ample’

ample, 7 more

Today it means

adj Relating to amplitude.

Sources

Sources: Wiktionary, “amplitudinal”; the older steps come from the Wiktionary entry for Latin amplitudo. 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 *pleh₁- / amplitudinal

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