Etymograph

English

effusion

Effusion comes from Latin effūsiō ‘outpouring’, from effundō ‘to pour out, shed, spread abroad, drain off’, and ultimately from Proto-Indo-European *ǵʰewd-.

  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‘pour’
  5. Latinc. 75 BCE–200 CEeffundō2‘to pour out, shed, spread abroad, drain off’
  6. Latinc. 75 BCE–200 CEeffūsiō3‘outpouring’
  7. Middle Frenchc. 1400–1600effusion3
  8. Englishearliest quotation 1946effusion3

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin effundo
  2. 2 Wiktionary, Latin effusio
  3. 3 Wiktionary, English effusion
  4. Earliest quotation in Wiktionary’s entry: 1946, William Hatfield, Buffalo Jim: “The housekeeper, a very decorative brunette of thirty-five with…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*ǵʰewd-Wiktionary, Latin effundo‘to pour’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*ǵʰunédtiWiktionary, Latin effundoreconstructed
  3. Proto-Italicc. 1500–700 BCE*hundōWiktionary, Latin effundo‘to pour out’reconstructed
  4. Latinc. 75 BCE–200 CEfundōWiktionary, Latin effundo‘pour’
  5. Latinc. 75 BCE–200 CEeffundōWiktionary, Latin effusio‘to pour out, shed, spread abroad, drain off’
  6. Latinc. 75 BCE–200 CEeffūsiōWiktionary, English effusion‘outpouring’
  7. Middle Frenchc. 1400–1600effusionWiktionary, English effusion
  8. Englishearliest quotation 1946effusionWiktionary, English effusion. Earliest quotation in Wiktionary’s entry: 1946, William Hatfield, Buffalo Jim: “The housekeeper, a very decorative brunette of thirty-five with…”

Linked words

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

yet, gut, refuse, font, fuse, 41 more

through Proto-Italic *hundō ‘to pour out’

confused, foundry, fondue, 36 more

through Latin fundō ‘pour’

foundation, founder, fundamental, refund, confusion, funnel, confuse, diffuse, confound, diffusion, infusion, infuse, perfusion, profusion, 42 more

Today it means

noun A liquid outpouring.

Sources

Sources: Wiktionary, “effusion”; the older steps come from the Wiktionary entries for Latin effundo, Latin effusio. 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- / effusion

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