ἰγνύη
From LSJ
τὰ καλὰ καὶ συμφέροντα ταῖς ψυχαῖς ἡμῶν καὶ εἰρήνην τῷ κόσμῳ → what is good and profitable to our souls, and for peace to the world
English (Autenrieth)
(γόνυ): hollow of the knee, Il. 13.212†.
Frisk Etymological English
Grammatical information: f.
Meaning: part behind the knee (and the thigh) (Il.)
Other forms: ἰγνύα (Arist.), also forms of *ἰγνύς (ἰγνύσι h. Merc. 152, ἰγνύων, -ύν Arist.)
Origin: IE [Indo-European] [380] *genu- knee
Etymology: From *ἐν-γνύ-η place in the knee, hypostasis; ἰγνύς after ἰξύς, ὀσφύς and other parts of the body in -ύς. Solmsen Wortforsch. 214f. (Criticism by Ward Lang. 20, 76).