Etymologically

fortassis

Etymology and origin of the Latin word fortassis

Confidence
Probable
Formation
Derivation
First attested
c. 250–184 BC, Plautus
Ultimate origin
Latin (fors)
Etymology tree
inherited borrowed derived
Latin fortasse
Latin fortassis

Pronunciation

  • Classical: [fɔrˈtaːs.sɪs][1]
  • Ecclesiastical: [forˈtas.sis][1]

Forms

fortāssis (not comparable)[1]

Etymology

It is a by-form, from Latin fortasse (“perhaps”);[2][1] compare magis.[1] Priscian counted it among the adverbs derived from fors (“chance”).[3]

De Vaan thinks that adverb seems to come from a phrase forte (“by chance”) + an + sīt, “by chance whether it be”, but finds the sound changes, especially the short final vowel, unclear;[4] Köbler analyses it with ⟨sī vīs⟩, “if you will”, in place of the verb.[5]

Earliest recorded meaning

It is recorded from Plautus on,[4][5] meaning “perhaps”: fortassis tu auri dempsisti parum?, “perhaps you took off too little gold?”[2]

Semantic evolution

It is used with the indicative and the subjunctive, and with the verb left out.[2] Döderlein contrasts fortasse and fortassis, which affirm a possibility approaching probability and take the indicative, with forsitan, which takes the subjunctive.[6]

Charisius says that usage preferred fortasse because fortassis sounded harsh.[3] It is uncertain whether Cicero used it, since the manuscripts disagree;[3] Pliny the Elder, Ulpian, Rufinus and Augustine prefer it to fortasse.[3]

Timeline

  • c. 250–184 BC – Plautus uses it in the Bacchides and the Asinaria.[2][5]
  • 65–8 BC – Horace uses it with the subjunctive.[2][5]
  • 23/24–79 AD – Pliny the Elder prefers it to fortasse.[3][2][5]

Meanings

Adverb

  1. Perhaps, possibly.[2][7]

Usage notes

Metre never requires the form in -is in Plautus or Terence, while fortasse is often elided there before a vowel.[3]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ 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
  5. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ Döderlein, Ludwig (1874), Döderlein’s Hand-book of Latin Synonymes, tr. H. H. Arnold, Andover: W. F. Draper
  7. ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
Cite this entry

“Fortassis.” Etymologically, 20 Oct. 2026, etymologically.com/la/fortassis. Accessed 20 Oct. 2026.

Last edited on . ·