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insulatus

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Etymology and origin of the Latin word insulatus

Confidence
Established
Formation
Derivation
First attested
c. 125–175 AD, Apuleius
Ultimate origin
Latin īnsula
Etymology tree
inherited borrowed derived
Latin insula
French île
German Insel
Latin insulatus
From the same root
English peninsula ← insula
Latin paeninsula ← insula

Forms

īnsulātus (feminine īnsulāta, neuter īnsulātum); first/second-declension adjective[1]

Etymology

It is from Latin īnsula (“island”) + -ātus,[2][1] with the form and sense of a perfect passive participle of a verb *īnsulō that is not attested while Latin was spoken.[1]

Earliest recorded meaning

It first appears in Apuleius' De mundo, of regions once part of the mainland that the waves have turned into islands.[3][4][5]

Semantic evolution

Lewis & Short mark it as post-classical and cite it from Augustine's City of God as well.[6] Its sense stayed “made into an island”.[2][6] Through Italian isolato and French isolé it lies behind English isolated (1740),[7] and English insulate, “make into an island”, was taken from it in the 1530s.[7]

Timeline

  • c. 125–175 AD – Apuleius uses it of lands turned into islands.[3][4][5]
  • 354–430 AD – Augustine uses it.[6][5]
  • 1530s – English borrows it as insulate.[7]
  • 1740 – English isolated, ultimately from it through Italian and French, is first recorded.[7]

Meanings

Adjective

  1. Made into an island, insulated.[2][6][4]
  • insula
  • English insulate
  • English isolated

Usage notes

In British Medieval Latin the spelling insulatus is also a form of īnfulātus.[8]

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ a b c Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  5. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  7. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  8. ^ Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
Cite this entry

“Insulatus.” Etymologically, 24 Oct. 2026, etymologically.com/la/insulatus. Accessed 24 Oct. 2026.

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