Etymograph

English

pyroclastic

Pyroclastic comes from Ancient Greek πῦρ ‘fire’, and goes back to Proto-Indo-European *péh₂wr̥.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*péh₂wr̥1‘fire’reconstructed
  2. Proto-Hellenicc. 2200–1600 BCE*pāwər1reconstructed
  3. Ancient Greekc. 800–300 BCEπῦρ2pûr‘fire’
  4. Englishearliest quotation 1862pyroclastic2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Ancient Greek πῦρ
  2. 2 Wiktionary, English pyroclastic
  3. Earliest quotation in Wiktionary’s entry: 1862, Joseph Beete Jukes, Igneous Rocks: “The word "ash" is not a very good one…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*péh₂wr̥Wiktionary, Ancient Greek πῦρ‘fire’reconstructed
  2. Proto-Hellenicc. 2200–1600 BCE*pāwərWiktionary, Ancient Greek πῦρreconstructed
  3. Ancient Greekc. 800–300 BCEπῦρWiktionary, English pyroclasticpûr‘fire’
  4. Englishearliest quotation 1862pyroclasticWiktionary, English pyroclastic. Earliest quotation in Wiktionary’s entry: 1862, Joseph Beete Jukes, Igneous Rocks: “The word "ash" is not a very good one…”

Linked words

through Proto-Indo-European *péh₂wr̥ ‘fire’

fire, fiery, poppy, 16 more

through Ancient Greek πῦρ ‘fire’

bureau, burrito, bertram, pyre, pyrite, burro, 13 more

Today it means

adj Mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

Sources

Sources: Wiktionary, “pyroclastic”; the older steps come from the Wiktionary entry for Ancient Greek πῦρ. 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 *péh₂wr̥ / pyroclastic

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