Etymograph

English

eighthly

Eighthly comes from Middle English eightethe ‘eighth’, and goes back to Proto-Indo-European *oḱtṓw.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*oḱtṓw1‘eight’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*oḱtowós1reconstructed
  3. Proto-Germanicc. 500 BCE–200 CE*ahtudô1‘eighth’reconstructed
  4. Proto-West Germanicc. 200–500 CE*ahtudō1‘eighth’reconstructed
  5. Old Englishc. 450–1150eahtoþa1‘eighth’
  6. Middle Englishc. 1150–1500eightethe1‘eighth’
  7. English1500–presenteighth1
  8. Englishtodayeighthly1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English eighthly

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*oḱtṓwWiktionary, English eighthly‘eight’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*oḱtowósWiktionary, English eighthlyreconstructed
  3. Proto-Germanicc. 500 BCE–200 CE*ahtudôWiktionary, English eighthly‘eighth’reconstructed
  4. Proto-West Germanicc. 200–500 CE*ahtudōWiktionary, English eighthly‘eighth’reconstructed
  5. Old Englishc. 450–1150eahtoþaWiktionary, English eighthly‘eighth’
  6. Middle Englishc. 1150–1500eightetheWiktionary, English eighthly‘eighth’
  7. English1500–presenteighthWiktionary, English eighthly
  8. EnglishtodayeighthlyWiktionary, English eighthly

Linked words

through Proto-Indo-European *oḱtṓw ‘eight’

octave, octavo, aught, 18 more

Today it means

adv In the eighth place; eighth in a row.

Sources

Sources: Wiktionary, “eighthly”. 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 *oḱtṓw / eighthly

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