ἐνδόμησις
From LSJ
τους φίλους λόγων τέχναιν επαίδευσας → Using 2 artifices, you educated (taught) those who love rhetoric.
English (LSJ)
εως, ἡ,
A thing built in, structure, τοῦ τείχους Apoc.21.18; esp. mole or breakwater, J.AJ15.9.6; cf. ἐνδώμησις.