Etymologically

rigiditas

Etymology and origin of the Latin word rigiditas

Confidence
Established
Formation
Derivation
First attested
c. 84–25 BC Vitruvius More words from the 1st century BC
Ultimate origin
Latin rigidus
Etymology tree
inherited borrowed derived
Latin rigeō
Latin rigidus
English rigid
Latin rigiditās
English rigidity
From the same root
Latin rigor ← rigeō

Forms

rigiditās f (genitive rigiditātis); third declension[1]

Etymology

It is formed from Latin rigidus (“stiff, rigid”) + -tās.[2][1]

Earliest recorded meaning

Vitruvius uses it of the stiffness and hardness of wood.[3][4][5]

Semantic evolution

In British Medieval Latin it is stiffness of the body, in a medical question about erection, and figuratively severity or harshness, of penalties stricter than the divine law.[6] English took it over in the 1620s as rigidity, “stiffness, inflexibility”.[7]

Timeline

  • c. 84–c. 25 BC – Vitruvius uses it of the stiffness of wood.[2][8]
  • 1620s – English borrows it as rigidity.[7]

Meanings

Noun

  1. Stiffness, rigidity; the quality of not bending.[2][3]
  2. (Medieval Latin) Severity, harshness.[6]

References

  1. ^ a b 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 Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  5. ^ Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  6. ^ a b 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
  7. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  8. ^ Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry

“Rigiditas.” Etymologically, 14 Nov. 2026, etymologically.com/la/rigiditas. Accessed 14 Nov. 2026.

Last edited on . ·