Etymology and origin of the Ancient Greek word κλάω
- Confidence
- Disputed
- Formation
- Borrowing
- First attested
- 700s BC Homer, Iliad
- From
- Pre-Greek
- Ultimate origin
- Pre-Greek
Pronunciation
Forms
κλᾰ́ω (kláō) [1] Aorist ἔκλασα, epic κλάσα; passive aorist ἐκλάσθην, perfect κέκλασμαι.[2][3]
Etymology
Beekes considers it Pre-Greek, because the uniform verbal system built on ⟨κλα(σ)-⟩ has no matching formation outside Greek and cannot be derived from an Indo-European *klas-.[4][1] It was traditionally derived from Proto-Indo-European *kelh₂- (“to beat, break”), the root of Lithuanian kálti (“to forge, hammer”) and Latin percellō (“to beat down”), but the verbs in those languages are formed quite differently.[1][4][5] Chantraine holds that it is certainly related to κλάδος (kládos, “branch”), and connects κλῆμα (klêma, “vine twig”), κόλος (kólos) and κλῆρος (klêros).[5]
Earliest recorded meaning
In the Iliad an arrow-shaft breaks off, and in the Odyssey Odysseus breaks a leafy branch from a bush.[3][2][6]
Semantic evolution
It has many prefixed forms, such as ἀνακλάω (anakláō) “to bend back”, used technically of the reflection of light, and the frequent κατακλάω (katakláō).[5] Aristotle and the mathematicians used the passive for a line broken or deflected at a point and for visual rays, and Theophrastus for pruning the shoots of the vine.[3] In the New Testament it is the breaking of bread, by which the head of the household began the meal; the phrase was used of Jesus' meals and of the meals of the first Christians.[7][8]
Later and Byzantine Greek formed a new present κλάνω (klánō),[5][9] and Modern Greek κλάνω (kláno) means “to break wind”.[10]
Timeline
- Homer – The Iliad and the Odyssey use it of breaking a shaft and a branch.[3][2]
- 6th century BC – Anacreon has an athematic participle ἀποκλάς (apoklás).[4][11]
- 4th century BC – Aristotle uses the passive of broken lines and deflected rays.[3][11]
- 4th–3rd century BC – Theophrastus uses it for breaking off vine shoots.[3][11]
- 1st century AD – The New Testament uses it for breaking bread.[7][3]
- 1100–1669 – Vernacular Greek has the new present κλάνω (klánō).[9]
- Modern Greek – κλάνω (kláno) means “to break wind”.[10]
Meanings
Verb
- To break off, of a branch or shoot; to prune vines.[3][2]
- To break in two or in pieces; especially to break bread.[2][7]
- (geometry, optics) To deflect, to draw a line broken at a point; passive, of rays, to be deflected.[3]
- (passive) Of the course of a comet, to be erratic, not straight.[2]
Word family
- ἀνακλάω (anakláō)
- κατακλάω (katakláō)
- κλάσις (klásis)
- ἄκλαστος (áklastos)
- κλάσμα (klásma)
- κλάστης (klástēs)
- κλαστός (klastós)
Related words
- κελεός (keleós)
- κλάδος (kládos)
- κλαμβός (klambós)
- κλῆμα (klêma)
- κλῆρος (klêros)
- κλών (klṓn)
- κόλαφος (kólaphos)
- κολοβός (kolobós)
- κόλος (kólos)
Usage notes
A separate word κλάω, with long ⟨ᾱ⟩, is the Attic form of κλαίω (klaíō, “to weep”).[3][12]
References
- ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f Diggle, James, et al., eds. (2021), The Cambridge Greek Lexicon, Cambridge: Cambridge University Press
- ^ a b c d e f g h i j Liddell, Henry George; Scott, Robert; Jones, Henry Stuart (1940), A Greek-English Lexicon, 9th ed., Oxford: Clarendon Press
- ^ a b c Beekes, Robert S. P. (2010), Etymological Dictionary of Greek, with the assistance of Lucien van Beek, Leiden Indo-European Etymological Dictionary Series 10, Leiden; Boston: Brill
- ^ a b c d Chantraine, Pierre (2009), Dictionnaire étymologique de la langue grecque: histoire des mots, new ed. with a supplement (Chroniques d'étymologie grecque 1–10), Paris: Klincksieck
- ^ Keersmaekers, Alek (2021–2025), GLAUx: The Greek Language Automated corpus, https://github.com/alekkeersmaekers/glaux
- ^ a b c Bauer, Walter; Danker, Frederick W., et al. (2000), A Greek-English Lexicon of the New Testament and Other Early Christian Literature, 3rd ed., Chicago: University of Chicago Press
- ^ United Bible Societies (2023), UBS Dictionary of the Greek New Testament (revised Louw–Nida semantic domains), open-licence ed.
- ^ a b Kriaras, Emmanuel, Επιτομή του Λεξικού της μεσαιωνικής ελληνικής δημώδους γραμματείας 1100–1669, Κέντρο Ελληνικής Γλώσσας, https://www.greek-language.gr
- ^ a b Ινστιτούτο Νεοελληνικών Σπουδών (Ίδρυμα Μανόλη Τριανταφυλλίδη) (1998), Λεξικό της κοινής νεοελληνικής, Thessaloniki: Aristotle University of Thessaloniki
- ^ a b c Rodríguez Adrados, Francisco, et al., eds. (1980–), Diccionario Griego-Español, Madrid: CSIC, http://dge.cchs.csic.es/xdge
- ^ Πάπυρος–Larousse–Britannica, Μέγα Λεξικό της Ελληνικής Γλώσσας, Athens: Πάπυρος
Related etymologies
Cite this entry
“Κλάω.” Etymologically, 1 Nov. 2026, etymologically.com/grc/%CE%BA%CE%BB%CE%AC%CF%89. Accessed 2 Nov. 2026.
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