Etymograph

English

diffusive

Diffusive comes from Latin diffusivus ‘tending to spread’, from diffundō ‘diffuse, disperse’, and ultimately from Proto-Indo-European *ǵʰewd- ‘to pour’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*ǵʰewd-1‘to pour’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*ǵʰunédti1reconstructed
  3. Proto-Italicc. 1500–700 BCE*hundō1‘to pour out’reconstructed
  4. Latinc. 75 BCE–200 CEfundō1‘to pour out, shed’
  5. Latinc. 75 BCE–200 CEdiffundō2as diffundere‘diffuse, disperse’
  6. Latinc. 75 BCE–200 CEdiffusivus2‘tending to spread’
  7. Englishearliest quotation 1791diffusive2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin diffundo
  2. 2 Wiktionary, English diffusive
  3. Earliest quotation in Wiktionary’s entry: 1791, Edward Gibbon, Memoirs of My Life: “I can never forget the delight with which that…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*ǵʰewd-Wiktionary, Latin diffundo‘to pour’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*ǵʰunédtiWiktionary, Latin diffundoreconstructed
  3. Proto-Italicc. 1500–700 BCE*hundōWiktionary, Latin diffundo‘to pour out’reconstructed
  4. Latinc. 75 BCE–200 CEfundōWiktionary, Latin diffundo‘to pour out, shed’
  5. Latinc. 75 BCE–200 CEdiffundōWiktionary, English diffusiveas diffundere‘diffuse, disperse’
  6. Latinc. 75 BCE–200 CEdiffusivusWiktionary, English diffusive‘tending to spread’
  7. Englishearliest quotation 1791diffusiveWiktionary, English diffusive. Earliest quotation in Wiktionary’s entry: 1791, Edward Gibbon, Memoirs of My Life: “I can never forget the delight with which that…”

Linked words

through Proto-Indo-European *ǵʰewd- ‘to pour’

yet, refuse, gut, font, fuse, effusive, 40 more

through Proto-Italic *hundō ‘to pour out’

confused, foundry, infusion, fondue, perfusion, profusion, effusion, 36 more

through Latin fundō ‘to pour out, shed’

foundation, founder, fundamental, refund, confusion, fusion, confuse, funnel, confound, infuse, 46 more

Today it means

adj That is spread or dispersed across a wide area or among a large number of people.

Sources

Sources: Wiktionary, “diffusive”; the older steps come from the Wiktionary entry for Latin diffundo. 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 *ǵʰewd- / diffusive

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