Etymograph

English

estimation

Estimation comes from Latin aestimatio ‘valuation, estimation according to its worth,…’, and goes back to aestimo ‘to determine the value of something’.

  1. Latinc. 75 BCE–200 CEaestimo1‘to determine the value of something’
  2. Latinc. 75 BCE–200 CEaestimatio2‘valuation, estimation according to its worth, appraisal’
  3. Old Frenchc. 842–1400estimacion2
  4. Middle Englishc. 1150–1500estimacioun2
  5. Englishtodayestimation2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin aestimatio
  2. 2 Wiktionary, English estimation

Earlier history uncertain. See Wiktionary.

Lineage

  1. Latinc. 75 BCE–200 CEaestimoWiktionary, Latin aestimatio‘to determine the value of something’
  2. Latinc. 75 BCE–200 CEaestimatioWiktionary, English estimation‘valuation, estimation according to its worth, appraisal’
  3. Old Frenchc. 842–1400estimacionWiktionary, English estimation
  4. Middle Englishc. 1150–1500estimaciounWiktionary, English estimation
  5. EnglishtodayestimationWiktionary, English estimation

Formed from estimate + -ion

Latin aestimō ‘to determine the value of something’

Latin aestimātus ‘assessed, estimated, reckoned, considered’

Middle English estimat

English estimate

Linked words

through Old Latin aestumō

inestimable, 4 more

through Latin aestimo ‘to determine the value of something’

esteem, 3 more

Today it means

noun The process of making an estimate.

Sources

Sources: Wiktionary, “estimation”; the older steps come from the Wiktionary entry for Latin aestimatio. 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 / Latin aestimo / estimation

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