Etymograph

English

affirmatio

Affirmatio comes from Latin affirmātiō ‘affirmation’, from firmus ‘strong, powerful’, and ultimately from Proto-Indo-European *dʰer- ‘to support’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*dʰer-1‘to support’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*dʰermos1reconstructed
  3. Proto-Italicc. 1500–700 BCE*θermos1reconstructed
  4. Proto-Italicc. 1500–700 BCE*fermos1reconstructed
  5. Latinc. 75 BCE–200 CEfirmus1‘strong, powerful’
  6. Latinc. 75 BCE–200 CEfirmō1
  7. Latinc. 75 BCE–200 CEaffirmō1‘affirm, assert’
  8. Latinc. 75 BCE–200 CEaffirmātiō2‘affirmation’
  9. Englishtodayaffirmatio2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin affirmatio
  2. 2 Wiktionary, English affirmatio

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*dʰer-Wiktionary, Latin affirmatio‘to support’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*dʰermosWiktionary, Latin affirmatioreconstructed
  3. Proto-Italicc. 1500–700 BCE*θermosWiktionary, Latin affirmatioreconstructed
  4. Proto-Italicc. 1500–700 BCE*fermosWiktionary, Latin affirmatioreconstructed
  5. Latinc. 75 BCE–200 CEfirmusWiktionary, Latin affirmatio‘strong, powerful’
  6. Latinc. 75 BCE–200 CEfirmōWiktionary, Latin affirmatio
  7. Latinc. 75 BCE–200 CEaffirmōWiktionary, Latin affirmatio‘affirm, assert’
  8. Latinc. 75 BCE–200 CEaffirmātiōWiktionary, English affirmatio‘affirmation’
  9. EnglishtodayaffirmatioWiktionary, English affirmatio

Linked words

through Proto-Indo-European *dʰer- ‘to support’

dark, drug, dry, drama, dare, throne, drain, drone, feasible, refrain, darn, formidable, drastic, dazed, dharma, dor, dern, 38 more

through Proto-Italic *fermos

confirmation, 6 more

through Latin firmus ‘strong, powerful’

confirm, infirmary, infirm, firmament, 8 more

through Latin firmō

firm, 6 more

Today it means

noun Making a statement as if it were in response to a question or were in dispute, especially when it is not.

Sources

Sources: Wiktionary, “affirmatio”; the older steps come from the Wiktionary entry for Latin affirmatio. 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 *dʰer- / affirmatio

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