прочный
From LSJ
Cras amet qui numquam amavit quique amavit cras amet → May he love tomorrow who has never loved before; And may he who has loved, love tomorrow as well.
Russian > Greek
παραμόνιμος, παρμόνιμος, ἐπιστατικός, κάτοχος, βέβαιος, ὀχυρός, ἰσχυρός, ἀμαιμάκετος, μόνιμος, ἀτειρής, ἔμμονος, δευσοποιός, ἔμπεδος, εὐπρυμνής, δυσραγής, καρτερός, ῥωμαλέος, συστατός, σύστατος, κραταιγύαλος, ἐμβριθής, εὐσταθής, ἐϋσταθής