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obscurus

Etymology and origin of the Latin word obscurus

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Confidence
Probable
Formation
Compound
First attested
Ennius
Ultimate origin
Proto-Italic (*skoiro-)

Pronunciation

  • IPA (Classical): [ɔpˈskuː.rʊs][1]
  • IPA (Ecclesiastical): [obˈskuː.rus][1]

Forms

obscūrus (feminine obscūra, neuter obscūrum, comparative obscūrior, superlative obscūrissimus, adverb obscūrē); first/second-declension adjective[1]

Etymology

It is from Latin ob- + *scūrus, a fossilized compound of ob- and an adjective *scūrus “dark”, from Proto-Italic *skoi-ro-.[1][2][3] De Vaan derives this from Proto-Indo-European *skoh₂-i-ro- (“dark, shady”), comparing Ancient Greek σκίρον (skíron, “parasol”) and Gothic 𐍃𐌺𐌴𐌹𐍂𐍃 (skeirs, “clear”), and notes that the division ⟨ob-scūrus⟩ or ⟨obs-cūrus⟩ is disputed.[3] The OLD compares English sky.[2]

Earliest recorded meaning

De Vaan and Köbler date it from Ennius.[3][4] Köbler dates Ennius 204–169 BC.[4]

Semantic evolution

It meant dark or dim, of light, stars and places, as in Virgil's obscūrus lūcus “a dark grove” and nox obscūra.[2][5] It then meant dimly seen, hidden from sight, of sounds muffled, and of people little known or humble.[2] Of facts, speech and writing it meant obscure, uncertain or hard to understand, and of character reserved or secretive.[2][5]

Döderlein contrasts obscūrum, darkness as an obstruction of light, opposed to illūstre, with tenebrae, complete darkness.[6] English obscure is recorded about 1400, first in the sense “dark”.[7] It survives in Italian oscuro, Italian scuro and Spanish oscuro.[1]

Timeline

  • 204–169 BC – Ennius uses it.[3][4]
  • 81–43 BC – Cicero speaks of a dim, misty star.[2][4]
  • 70–19 BC – Virgil speaks of a dark grove.[5][4]
  • c. 1400 – English obscure is recorded.[7]

Meanings

Adjective

  1. Dark, dim, gloomy.[2]
  2. Dimly seen, shadowy; hidden.[2]
  3. (of sound) Muffled.[2]
  4. (of persons) Little known, humble.[2]
  5. Uncertain, hard to understand, obscure.[2][5]
  6. (of character) Reserved, secretive.[5]

Word family

  • obscurefacio
  • obscūridicus
  • obscūritās
  • obscūrō
  • obscūrum
  • perobscūrus
  • subobscūrus
  • obscūrē
  • obscūrātiō
  • English obscure

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  4. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b c d e Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  6. ^ Döderlein, Ludwig (1874), Döderlein’s Hand-book of Latin Synonymes, tr. H. H. Arnold, Andover: W. F. Draper
  7. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
Cite this entry

“Obscurus.” Etymologically, 16 Oct. 2026, etymologically.com/la/obscurus. Accessed 16 Oct. 2026.

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