From Proto-Indo-European *serk- (“to make whole”).
ὅρκος • (hórkos) m (genitive ὅρκου); second declension
- the object by which one swears, the witness of an oath, as the Styx was among the gods, or as Zeus was among mortals
- an oath
- ὅρκος in Liddell & Scott (1940) A Greek–English Lexicon, Oxford: Clarendon Press
- «ὅρκος» in Autenrieth, Georg (1891) A Homeric Dictionary for Schools and Colleges, New York: Harper and Brothers
- «ὅρκος» in Cunliffe, Richard J. (1924) A Lexicon of the Homeric Dialect: Expanded Edition, Norman: University of Oklahoma Press, published 1963
- «ὅρκος» in Slater, William J. (1969) Lexicon to Pindar, Berlin: Walter de Gruyter
- «ὅρκος» in Bailly, Anatole (1935) Le Grand Bailly: Dictionnaire grec-français, Paris: Hachette
- Woodhouse, S. C. (1910) English-Greek Dictionary: A Vocabulary of the Attic Language, London: Routledge & Kegan Paul Limited.