Etymograph

English

operose

Operose comes from Latin operōsus ‘painstaking’, from opus ‘work, labor, accomplishment’, and ultimately from Proto-Indo-European *h₃ep-.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*h₃ep-1‘to work, toil, make’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*h₃épos1‘work’reconstructed
  3. Proto-Italicc. 1500–700 BCE*opos1‘work’reconstructed
  4. Latinc. 75 BCE–200 CEopus1‘work, labor, accomplishment’
  5. Latinc. 75 BCE–200 CEopera1
  6. Latinc. 75 BCE–200 CEoperōsus2‘painstaking’
  7. Englishearliest quotation 1662operose2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin operosus
  2. 2 Wiktionary, English operose
  3. Earliest quotation in Wiktionary’s entry: 1662, Edward Stillingfleet, The Truth of Scripture-History Asserted: “when there was so great reason to make it…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*h₃ep-Wiktionary, Latin operosus‘to work, toil, make’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*h₃éposWiktionary, Latin operosus‘work’reconstructed
  3. Proto-Italicc. 1500–700 BCE*oposWiktionary, Latin operosus‘work’reconstructed
  4. Latinc. 75 BCE–200 CEopusWiktionary, Latin operosus‘work, labor, accomplishment’
  5. Latinc. 75 BCE–200 CEoperaWiktionary, Latin operosus
  6. Latinc. 75 BCE–200 CEoperōsusWiktionary, English operose‘painstaking’
  7. Englishearliest quotation 1662operoseWiktionary, English operose. Earliest quotation in Wiktionary’s entry: 1662, Edward Stillingfleet, The Truth of Scripture-History Asserted: “when there was so great reason to make it…”

Linked words

through Proto-Indo-European *h₃ep- ‘to work, toil, make’

office, official, bus, copy, omnibus, copious, officiate, opulence, omnivore, officiant, officious, 19 more

through Latin opus ‘work, labor, accomplishment’

cooperation, operative, cooperate, opus, 7 more

through Latin opera

operation, operate, operator, opera, ure, oeuvre, operetta, 9 more

Today it means

adj Of a person: busy, industrious, or painstaking.

Sources

Sources: Wiktionary, “operose”; the older steps come from the Wiktionary entry for Latin operosus. 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 *h₃ep- / operose

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