Etymologically

Etymology and origin of the Latin word interdum

Confidence
Established
Formation
Compound
First attested
c. 250–184 BC, Plautus
Ultimate origin
Latin (inter,dum)
Etymology tree
inherited borrowed derived
Latin inter
French entre
Latin interdum

Pronunciation

  • Classical: [ɪnˈtɛr.dũː][1]
  • Ecclesiastical: [inˈtɛr.dum][1]

Forms

interdum (not comparable)[1]

Etymology

It is formed from Latin inter (“between”) + dum (“while”).[2][1][3]

Earliest recorded meaning

Köbler dates it from Plautus,[3] who makes Jupiter say ego sum ille Amphitruō … quī interdum fīō Iuppiter, quandō lubet, “I am that Amphitryon who now and then becomes Jupiter, whenever I like”.[2][4]

Semantic evolution

Interdum is “at times, now and then, occasionally”, like nōnnumquam (Cicero: interdum cursus est in ōrātiōne incitātior, interdum moderāta ingressiō, “in a speech there is sometimes a swifter pace, sometimes a measured step”).[2][4][1] In Silius and later it can also mean “meanwhile, for the time being”.[2]

Church Latin glosses it “sometimes, occasionally, now and then”,[5] and in Medieval Latin “meanwhile” is common.[6]

Timeline

  • c. 250–184 BC – Plautus: quī interdum fīō Iuppiter.[2][3]
  • 81–43 BC – Cicero: interdum cursus est in ōrātiōne incitātior.[4][3]
  • 25–101 AD – Silius uses it in the sense “meanwhile”.[2][3]

Meanings

Adverb

  1. sometimes, at times, now and then, occasionally.[2][4][1][5]
  2. meanwhile, in the meantime; for the time being.[2][6]

Word family

  • interduātim

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  5. ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  6. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
Cite this entry

“Interdum.” Etymologically, 18 Oct. 2026, etymologically.com/la/interdum. Accessed 18 Oct. 2026.

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