Etymologically

seriosus

This is the current revision of this entry, as edited by bogdan on 23 October 2026 at 15:08. This address is a permanent link to this version.

Pronunciation

  • Classical: [seː.riˈoː.sʊs][1]
  • Ecclesiastical: [se.riˈɔː.s̬us][1]

Forms

sēriōsus (feminine sēriōsa, neuter sēriōsum); first/second-declension adjective[1]

Etymology

It is from Latin sērius (“serious, earnest”) + -ōsus.[1][2][3] It is the source of French sérieux and Italian serioso,[1] and through Old French serios of English serious.[4]

Earliest recorded meaning

The earliest record Köbler gives is from the mid-11th century,[3] in the sense “serious, earnest”.[2][3]

Semantic evolution

It kept the sense “serious, grave”: Vincent of Beauvais describes a man as multumque sēriōsus et gravis in mōribus, “very serious and grave in his ways”,[5] and a papal letter of 1299 urges per sēriōsās litterās, “by earnest letters”.[6] Neo-Latin writers still used it, among them Aurispa and Bruno.[7]

Timeline

  • mid 11th century – First recorded.[3]
  • 1299 – A papal letter uses it for “earnest”.[6]
  • early 15th century – English serious appears, from Old French and Late Latin.[4]
  • 1535 – A document speaks of a sēriōsa et omnimoda mēns, a serious and complete intention.[7]

Meanings

Adjective

  1. (Late Latin, Medieval Latin) serious, earnest, grave.[2][6][1]

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  3. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ du Cange, Charles du Fresne, et al. (1883–1887), Glossarium mediae et infimae latinitatis, augmented ed. by Léopold Favre, Niort: L. Favre
  6. ^ a b c 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 Ramminger, Johann, Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700, www.neulatein.de