onzeggelijk
From LSJ
ὃν οὐ τύπτει λόγος οὐδὲ ῥάβδος → if words don't get through, neither a beating will | if the carrot doesn't work, the stick will not work either | whom words do not strike, neither does the rod
Dutch > Greek
ἄφατος, ἄφραστος, οὐ φατός, ἀνωνόμαστος, ἀμύθητος, ἄρρητος, ἀπόρρητος, ἄγρυκτος, ἀναύδητος, ἀνεκλάλητος, ἄλεκτος, δύσφατος, ἄσπετος, ἀφώνητος, ἀναυδής, ἄεπτος, ἀνέκφραστος, ἀθέσφατος, ἀπειρέσιος, ἄλαλος, ἀνεκφώνητος, ἄφθεγκτος, ἀπόφημος, ἄναυδος, ἀλάλητος