ἰσχίον

No etymology. Furnée connects the word with ἰξύς (ixús, “loins”) assuming a common Pre-Greek origin.

ῐ̓σχῐ́ον • (iskhíon) n (genitive ῐ̓σχῐ́ου); second declension (Epic, Ionic, Attic, Koine)

1. (anatomy) hip-joint
   • 800 BCE – 600 BCE, Homer, Iliad 5.5:

     τῷ βάλεν Αἰνείαο κατ’ ἰσχίον, ἔνθα τε μηρὸς
     ἰσχίῳ ἐνστρέφεται, κοτύλην δέ τέ μιν καλέουσιν

     tôi bálen Aineíao kat’ iskhíon, éntha te mēròs
     iskhíōi enstréphetai, kotúlēn dé té min kaléousin

     • 1924 translation by Murray

       [he smote Aeneas] on the hip, where the thigh turns in the hip joint,—the cup, men call it

2. area around the hip-joint; haunch

• Latin: ischion, ischium
• English: ischium, ischiatic, sciatic

• “ἰσχίον”, in Liddell & Scott (1940) A Greek–English Lexicon, Oxford: Clarendon Press
• “ἰσχίον”, in Liddell & Scott (1889) An Intermediate Greek–English Lexicon, New York: Harper & Brothers
• “ἰσχίον”, in Autenrieth, Georg (1891) A Homeric Dictionary for Schools and Colleges, New York: Harper and Brothers
• ἰσχίον in Bailly, Anatole (1935) Le Grand Bailly: Dictionnaire grec-français, Paris: Hachette
• ἰσχίον in Cunliffe, Richard J. (1924) A Lexicon of the Homeric Dialect: Expanded Edition, Norman: University of Oklahoma Press, published 1963
• Beekes, Robert S. P. (2010) Etymological Dictionary of Greek (Leiden Indo-European Etymological Dictionary Series; 10), with the assistance of Lucien van Beek, Leiden, Boston: Brill, →ISBN