Etymograph

English

operatory

Operatory comes from Late Latin operor ‘to work, labor’, from Latin operātus ‘having worked, laboured, toiled’, and ultimately from Proto-Indo-European *h₃ep- ‘to work, toil, make’.

  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 CEoperātus1‘having worked, laboured, toiled’
  7. Late Latinc. 200–600 CEoperor2‘to work, labor’
  8. Medieval Latinc. 600–1500operātōrium2participle of operor
  9. Englishtodayoperatory2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin operor
  2. 2 Wiktionary, English operatory

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*h₃ep-Wiktionary, Latin operor‘to work, toil, make’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*h₃éposWiktionary, Latin operor‘work’reconstructed
  3. Proto-Italicc. 1500–700 BCE*oposWiktionary, Latin operor‘work’reconstructed
  4. Latinc. 75 BCE–200 CEopusWiktionary, Latin operor‘work, labor, accomplishment’
  5. Latinc. 75 BCE–200 CEoperaWiktionary, Latin operor
  6. Latinc. 75 BCE–200 CEoperātusWiktionary, Latin operor‘having worked, laboured, toiled’
  7. Late Latinc. 200–600 CEoperorWiktionary, English operatory‘to work, labor’
  8. Medieval Latinc. 600–1500operātōriumWiktionary, English operatoryparticiple of operor
  9. EnglishtodayoperatoryWiktionary, English operatory

The story

The modern senses may be derived independently of the obsolete senses.

Full etymology on Wiktionary

Linked words

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

office, official, bus, copy, omnibus, copious, opulence, officiate, officiant, officious, omnivore, 24 more

through Latin opus ‘work, labor, accomplishment’

opus, 11 more

through Latin opera

ure, oeuvre, operetta, 11 more

through Late Latin operor ‘to work, labor’

cooperation, cooperate, 4 more

Today it means

adj effective; practical; operative

Sources

Sources: Wiktionary, “operatory”; the older steps come from the Wiktionary entry for Latin operor. 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- / operatory

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