ἴσφνιον

τό
A. f.l. for ἴσθμιον, neck of a jar, E. Fr. 656: prov., χαλεπὸς βίος ἴσφνῑ ἄγοντος, expld. of a potter's life, cod.Par. ap. Nauck l.c., nisi leg. Ἴσθμῑ (cf. ἰσθμιάζω).
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project