Etymologically

Etymology and origin of the Latin word obscure

Confidence
Established
Formation
Derivation
First attested
81–43 BC, Cicero
Ultimate origin
Latin (obscūrus)
Etymology tree
inherited borrowed derived
Latin obscurus
Latin obscuritas
Latin obscure
Latin obscuro

Forms

obscūrē (comparative obscūrius, superlative obscūrissimē)[1]

Etymology

It is from Latin obscūrus (“dark, obscure”) + -ē, the adverb of the adjective.[1][2] The origin of obscūrus itself is disputed: de Vaan thinks its first meaning was darkened or covered, and finds a stem Proto-Italic *skoi-ro-, from Proto-Indo-European *skoh₂-i-ro- (“dark, shady”), more likely than other analyses, but marks the reconstruction with a query.[3]

Earliest recorded meaning

Köbler dates it from Cicero,[2] whose Academica says that we see either nothing of the things above or very dimly.[1]

Semantic evolution

Of sight and sound it means dimly or indistinctly;[1] Gellius uses it of small particles pronounced faintly.[1] Of expression it means without clear definition, as Cicero admits he has said something rather obscurely, and cryptically, so that with a negative it means in plain terms: in the first speech against Catiline he says “I will not speak darkly”.[1] Of actions it means secretly or furtively, and the phrase obscure ferre is to make a secret of something.[1] It also means without notice, and of a person's life in an undistinguished way.[1]

Timeline

  • 81–43 BC – Cicero of seeing dimly, speaking obscurely and acting in secret.[1][2]
  • c. 165 AD – Gellius of sounds uttered faintly.[1][2]

Meanings

Adverb

  1. Dimly, indistinctly; of sound, faintly.[1]
  2. Obscurely, without clear definition; cryptically; with a negative, in plain terms.[1]
  3. Secretly, furtively;[1] obscure ferre, to conceal.[1]
  4. Without being noticed; in an obscure station in life.[1]

References

  1. ^ a b c d e f g h i j k l m n o Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  2. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  3. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
Cite this entry

“Obscure.” Etymologically, 19 Oct. 2026, etymologically.com/la/obscure. Accessed 20 Oct. 2026.

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