Etymologically

Etymology and origin of the Latin word iniquus

Confidence
Established
Formation
Derivation
First attested
c. 250–184 BC, Plautus
Ultimate origin
Latin (aequus)
Etymology tree
inherited borrowed derived
Latin aequus
Latin aequo
Latin aeque
Latin aequiter
Latin iniquus
Latin aequalis
English equal
French égal
French également
Latin aequaliter

Pronunciation

  • Classical: [ɪˈniː.kʊs][1]
  • Ecclesiastical: [iˈniː.kʷus][1]

Forms

inīquus (feminine inīqua, neuter inīquum, comparative inīquior, superlative inīquissimus); first/second-declension adjective[1] It is often written inīcus, which manuscripts confuse with inimīcus.[2]

Etymology

It is formed from Latin in- (“not”) + aequus (“level, equal, fair”), with the vowel weakened.[2][3][1] aequus (Old Latin ⟨aiquom⟩) is probably from ⟨*aikwos⟩, but de Vaan finds no convincing etymology for it.[4]

Earliest recorded meaning

Köbler dates it from Cicero,[5] but the OLD cites Plautus: illī inīquī iūs ignōrant, “those unfair men know nothing of justice”, and women live lēge … inīquiōre … quam virī, “under a harsher law than men”.[2]

Semantic evolution

Inīquus is first “uneven, rough” of ground (Caesar: subīre inīquissimum locum, “to climb a very steep place”), “unequal”, “excessive” or “too small”, and of a contest “ill-matched” (Cicero: haec est inīqua certātiō).[2][3] Of laws and actions it is “unfair, harsh” (of false weights, exorbitant interest, unjust charges), and of persons “prejudiced, hostile”; as a noun inīquus is an ill-wisher, an enemy.[2][1] Circumstances, positions, winds and seas that work against someone are inīqua, “unfavourable, adverse”.[2][1] Inīquō animō is “with resentment, discontentedly”.[2]

Church Latin glosses it “unjust, wicked, godless”, and as a noun “evildoer”.[6]

Timeline

  • c. 250–184 BC – Plautus: illī inīquī iūs ignōrant.[2][5]
  • 190–159 BC – Terence: nē istuc tam inīquō patiāre animō.[2][5]
  • 81–43 BC – Cicero: haec est inīqua certātiō.[2][5]
  • c. 50 BC – Caesar uses it of steep ground.[2][5]

Meanings

Adjective

  1. Uneven, rough, steep (of ground).[2][3]
  2. Unequal; excessive; too small.[2][1]
  3. Ill-matched; one-sided.[2]
  4. unfair, unjust, harsh.[2][1][6]
  5. Prejudiced, hostile.[2][1]
  6. Unfavourable, adverse.[2][1]
  7. inīquō animō: discontentedly, with resentment.[2]
  8. (Ecclesiastical Latin) Wicked, godless.[6]

Noun

  1. An ill-wisher, enemy;[2][6] (Ecclesiastical Latin) an evildoer.[2][6]

Word family

References

  1. ^ a b c d e f g h i j Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s t Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ 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. ^ a b c d e Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry

“Iniquus.” Etymologically, 18 Oct. 2026, etymologically.com/la/iniquus. Accessed 19 Oct. 2026.

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