Etymograph

English

roration

Roration comes from Latin rōrātio ‘dewfall’, from rōrō ‘to cause dew, drip’, and ultimately from Proto-Indo-European *h₁ers- ‘to flow’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*h₁ers-1‘to flow’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*h₁rṓs2‘liquid, moisture’reconstructed
  3. Proto-Italicc. 1500–700 BCE*rōs2reconstructed
  4. Latinc. 75 BCE–200 CErōs2‘dew’
  5. Latinc. 75 BCE–200 CErōrō3‘to cause dew, drip’
  6. Latinc. 75 BCE–200 CErōrātio4‘dewfall’
  7. Englishearliest quotation 1810roration4

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Proto-Indo-European *h₁rṓs
  2. 2 Wiktionary, Latin roro
  3. 3 Wiktionary, Latin roratio
  4. 4 Wiktionary, English roration
  5. Earliest quotation in Wiktionary’s entry: 1810, James Kennedy, Glenochel: A Descriptive Poem in Two Volumes: “That in the bland rorations calm Their luscious redolence…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*h₁ers-Wiktionary, Proto-Indo-European *h₁rṓs‘to flow’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*h₁rṓsWiktionary, Latin roro‘liquid, moisture’reconstructed
  3. Proto-Italicc. 1500–700 BCE*rōsWiktionary, Latin rororeconstructed
  4. Latinc. 75 BCE–200 CErōsWiktionary, Latin roro‘dew’
  5. Latinc. 75 BCE–200 CErōrōWiktionary, Latin roratio‘to cause dew, drip’
  6. Latinc. 75 BCE–200 CErōrātioWiktionary, English roration‘dewfall’
  7. Englishearliest quotation 1810rorationWiktionary, English roration. Earliest quotation in Wiktionary’s entry: 1810, James Kennedy, Glenochel: A Descriptive Poem in Two Volumes: “That in the bland rorations calm Their luscious redolence…”

Linked words

through Proto-Indo-European *h₁ers- ‘to flow’

error, err, erratic, rishi, errant, errata, 19 more

through Latin rōs ‘dew’

rory, 8 more

through Latin rōrō ‘to cause dew, drip’

rouse, 1 more

Today it means

noun Synonym of dewfall.

Sources

Sources: Wiktionary, “roration”; the older steps come from the Wiktionary entries for Proto-Indo-European *h₁rṓs, Latin roro, Latin roratio. 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 *h₁ers- / roration

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