From diatithemai; properly, a disposition, i.e. (specially) a contract (especially a devisory will) -- covenant, testament.
see GREEK diatithemai
διαθῆκαι (diathēkai) − 2 Occurrences
διαθήκη (diathēkē) − 9 Occurrences
διαθήκην (diathēkēn) − 5 Occurrences
διαθήκης (diathēkēs) − 16 Occurrences
διαθηκῶν (diathēkōn) − 1 Occurrence