Etymologically

παράλληλος

Etymology and origin of the Ancient Greek word παράλληλος

Confidence
Established
Formation
Compound
First attested
300s BC Aristotle More words from the 4th century BC
Ultimate origin
Ancient Greek παρά,ἀλλήλων
Etymology tree
inherited borrowed derived
Ancient Greek παρά (pará)
Ancient Greek παράλληλος (parállēlos)
Latin parallēlus
English parallel
From the same root
Ancient Greek παραβάλλω (parabállō) ← παρά
Ancient Greek παράδοξος (parádoxos) ← παρά
Ancient Greek παράσιτος (parásitos) ← παρά
Ancient Greek παράφερνα (parápherna) ← παρά
Ancient Greek πάρειμι (páreimi) ← παρά
Ancient Greek πάροικος (pároikos) ← παρά
English paradox ← παρά
English paranoia ← παρά
English parasite ← παρά
English parenthesis ← παρά

Pronunciation

  • 5th-century BC Attic: /pa.rál.lɛː.los/[1]
  • 4th-century AD Koine: /paˈral.li.los/[1]
  • 10th-century Byzantine: /paˈral.li.los/[1]

Forms

πᾰρᾰ́λληλος (parállēlos) m or f (neuter πᾰρᾰ́λληλον); second declension[1]

Etymology

It is formed from Ancient Greek παρά (pará, “beside”) + ἀλλήλων (allḗlōn, “one another”), “beside one another”.[1][2] It was often used as a noun, from phrases with “lines” or “circles” understood, and has the same formation as ἐπάλληλος (epállēlos) and κατάλληλος (katállēlos).[2]

Earliest recorded meaning

It is first found in Aristotle, who speaks of parallel lines and, in the Mechanics, of a seated man whose head and feet are parallel.[3][2][4]

Semantic evolution

From geometry it passed to astronomy and geography: the parallel circles were the five zones of the sphere, and Hipparchus and Strabo use the word for a parallel of latitude, such as the one through the Borysthenes.[3] Polybius uses it of ships and troops side by side and, with a dative, of a palisade running alongside a wall.[5][3]

Plutarch called his paired biographies of Greeks and Romans the Parallel Lives, and used the word of persons and circumstances that match each other.[5][3] Grammarians used it of words set side by side with the same sense, and its adverb of forms used indifferently.[3] The Hellenistic compounds παραλληλόγραμμος (parallēlógrammos) and παραλληλεπίπεδος (parallēlepípedos) come from it.[2]

It was borrowed as Latin parallēlus.[1] Modern Greek uses the learned παράλληλος (parálilos); the noun for a celestial parallel is a semantic loan from French, and words such as the one for “parallelism” render French learned terms made from the Greek.[6][2]

Timeline

  • 4th century BC – Aristotle uses it of parallel lines.[3][2][7]
  • 2nd century BC – Hipparchus uses it for a parallel of latitude.[3][7]
  • 2nd century BC – Polybius uses it of things running parallel to one another.[3][5][7]
  • 1st century BC to 1st century AD – Strabo names the parallel through the Borysthenes.[3][7]
  • 1st–2nd century AD – Plutarch writes his Parallel Lives.[3][5][7]
  • 2nd century AD – Apollonius Dyscolus uses it of words used side by side with the same meaning.[3][7]
  • Modern Greek – The learned παράλληλος (parálilos) names a parallel in geography and astronomy.[6]

Meanings

Adjective

  1. Beside one another, side by side (of ships, troops in columns).[3][5]
  2. (geometry) Parallel; as a feminine noun, a parallel line.[3][2]
  3. Running alongside, parallel to something (with the dative).[3][5]
  4. (astronomy, geography) As a masculine noun, a parallel of latitude; in the plural, the five zones of the sphere.[3]
  5. Matching, comparable (of persons, their lives and circumstances).[5][3]
  6. (grammar) Of words used side by side with the same meaning.[3]

Word family

  • παραλληλεπίπεδος (parallēlepípedos)
  • παραλληλισμός (parallēlismós)
  • παραλληλόγραμμος (parallēlógrammos)
  • παραλληλότης (parallēlótēs)

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Babiniotis, Georgios (2010), Ετυμολογικό λεξικό της νέας ελληνικής γλώσσας [Etymological Dictionary of Modern Greek], Athens: Κέντρο Λεξικολογίας
  3. ^ a b c d e f g h i j k l m n o p q Liddell, Henry George; Scott, Robert; Jones, Henry Stuart (1940), A Greek-English Lexicon, 9th ed., Oxford: Clarendon Press
  4. ^ Keersmaekers, Alek (2021–2025), GLAUx: The Greek Language Automated corpus, https://github.com/alekkeersmaekers/glaux
  5. ^ a b c d e f g Diggle, James, et al., eds. (2021), The Cambridge Greek Lexicon, Cambridge: Cambridge University Press
  6. ^ a b Ινστιτούτο Νεοελληνικών Σπουδών (Ίδρυμα Μανόλη Τριανταφυλλίδη) (1998), Λεξικό της κοινής νεοελληνικής, Thessaloniki: Aristotle University of Thessaloniki
  7. ^ a b c d e f Rodríguez Adrados, Francisco, et al., eds. (1980–), Diccionario Griego-Español, Madrid: CSIC, http://dge.cchs.csic.es/xdge
Cite this entry

“Παράλληλος.” Etymologically, 13 Nov. 2026, etymologically.com/grc/%CF%80%CE%B1%CF%81%CE%AC%CE%BB%CE%BB%CE%B7%CE%BB%CE%BF%CF%82. Accessed 14 Nov. 2026.

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