Etymologically

simplicitas

Etymology and origin of the Latin word simplicitas

Confidence
Established
Formation
Derivation
First attested
96–55 BC, Lucretius
Ultimate origin
Latin (simplex)
Etymology tree
inherited borrowed derived
Latin simplex
French simple
French simplement
Latin simplicitas

Forms

simplicitās f (genitive simplicitātis); third declension[1]

Etymology

It is from Latin simplex (“simple, single”) + -tās.[2][1] De Vaan traces ⟨simplex⟩ to Proto-Italic *sm̥-plak- (“simple”), with the prefix Proto-Indo-European *sm̥- (“one”) also seen in semel (“once”) and semper (“always”), cognate with Sanskrit सकृत् (sakṛ́t, “once”) and Ancient Greek ἅπαξ (hápax, “once”).[3]

Earliest recorded meaning

De Vaan and Köbler date it from Lucretius,[3][4] who says the first bodies are solid in their singleness.[2][5]

Semantic evolution

Its first sense is “singleness, unity”, and in Juvenal singleness of mind, a wife's devotion to one man.[2] It is rare until after Augustus and is not found in Cicero.[5] It then meant plainness and lack of elaboration, as Ovid's “once there was rough simplicity, now Rome is golden”, and above all an open, guileless nature: Livy has boyish candour, and also frankness and good humour used to calm someone's anger.[2] It could also be naivety, lack of sophistication, as in the elder Seneca.[2]

Church Latin glosses it “simplicity”.[6]

Timeline

  • 96–55 BC – Lucretius of the singleness of atoms.[2][4]
  • 59 BC–17 AD – Livy of boyish candour.[2][4]
  • 43 BC–18 AD – Ovid of simple manners.[2][4]
  • c. 67–c. 127 AD – Juvenal of singleness of mind.[2][4]

Meanings

Noun

  1. Singleness of nature, unity; singleness of mind.[2]
  2. Plainness, simplicity.[2][1][6]
  3. An open, guileless nature, ingenuousness; naivety.[2][1]
  4. Frankness, openness, candour.[2][1]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  4. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry

“Simplicitas.” Etymologically, 19 Oct. 2026, etymologically.com/la/simplicitas. Accessed 20 Oct. 2026.

Last edited on . ·