нерушимый

From LSJ

εἰργάζοντο λογάδην φέροντες λίθους καὶ ξυνετίθεσαν ὡς ἕκαστόν τι ξυμβαίνοι → they went to work bringing the stones as they picked them out and put them together as each one happened to fit

Source

Russian > Greek

γνωστός, βαθύς, ἄλυτος, ἀπαράβατος, σφυρήλατος, ἔμπεδος