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From LSJ
πολλάκις δοκεῖ τὸ φυλάξαι τἀγαθὰ τοῦ κτήσασθαι χαλεπώτερον εἶναι → it often proves harder to keep than to win prosperity | it is often harder for men to keep the good they have, than it was to obtain it
Russian > Greek
τεκμαίρομαι, ὄσσομαι, προγιγνώσκω, προγινώσκω, προφωνέω, ἀποσημαίνω, προδείκνυμι, προσημαίνω, προθεσπίζω, προαγορεύω, προφαίνω