Etymologically

Etymology and origin of the Latin word impensus

Confidence
Probable
Formation
Derivation
First attested
81–43 BC, Cicero
Ultimate origin
Latin (pendō)
Etymology tree
inherited borrowed derived
Latin impendo
Latin impendium
Latin impensus
Latin impense

Forms

impēnsus (feminine impēnsa, neuter impēnsum, comparative impēnsior, superlative impēnsissimus); first/second-declension adjective[1][2] It is also spelt inpēnsus.[1][3]

Etymology

It is from Latin impendō (“to pay out, expend”), the perfect passive participle used as an adjective, as Georges, Conte, Köbler and the TLL take it.[2][4][5][6] The OLD instead treats the whole word as a compound of in- (“not”) and pēnsus (“weighed”), and takes only the senses of high price and intensity as perhaps the participle of that verb.[1] De Vaan lists the verb among the derivatives of pendō (“to weigh, pay”), which goes back to Proto-Italic *pend-e/o- (“to hang”); most handbooks, he notes, see a variant of Proto-Indo-European *(s)penh₁- (“to spin, weave”) in its root.[7]

Earliest recorded meaning

Köbler records it first in Cicero,[5] who writes to Atticus that he would hand over a villa to Quintus even impenso pretio, at a high price.[1][4]

Semantic evolution

Of price it means high, dear: Caesar and Livy have impenso pretio, and Horace uses impenso alone for “at great cost”.[1][2] Gellius has heavier injuries punished with a damno impensiore, a heavier fine.[2] From the price it was transferred to degree, meaning great, strong, earnest: Cicero speaks of tam impensa voluntas bonorum, the strong goodwill of the good citizens, Lucretius of violent lust and Virgil of a burning love.[1][4] Ovid and Tacitus use the comparative impensior cura, Valerius Maximus of extravagant words of praise, Quintilian of hard work spent on a science, and Suetonius of the most urgent prayers.[1][2] In Ecclesiastical Latin it means ample, considerable, expensive, zealous, earnest.[8]

Timeline

  • 81–43 BC – Cicero uses it of a high price and of strong goodwill.[1][5]
  • 70–19 BC – Virgil uses it of a burning love.[1][5]
  • c. 75–c. 150 AD – Suetonius has impensissimae preces, the most urgent prayers.[1][2][5]

Meanings

Adjective

  1. Of price, high, dear, costly.[1][2]
  2. Of feelings and conduct, great, strong, earnest, immoderate.[1][2]

Usage notes

The OLD puts under this word a sense “not paid”, from a gloss in Festus on impensam stipem, sacred money not yet weighed out, and a Plautine line ingrato homine nihil impensius est, which it takes as “nothing is more worthless than an ungrateful man”;[1] the TLL and Köbler treat this as a separate word from in- and pēnsus, while Georges and Conte read the Plautus line as “nothing costs more than an ungrateful man”.[6][5][2][4] A noun impēnsus, fourth declension, “outlay, expense”, appears only in the ablative in Symmachus;[3][2][4] Lewis and Short and Georges render it “outlay”, Conte “zeal”.[3][2][4]

References

  1. ^ 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
  2. ^ a b c d e f g h i j k Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  3. ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ a b c d e f Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  5. ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  7. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  8. ^ Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson

Derived terms

Cite this entry

“Impensus.” Etymologically, 20 Oct. 2026, etymologically.com/la/impensus. Accessed 20 Oct. 2026.

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