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From LSJ
ἐξ ὀνύχων λέοντα τεκμαίρεσθαι → judge by the claws, judge by a slight but characteristic mark, small traits give the clue to the character of a person, deduce something from a small indication, identify a lion from its claws
Russian > Greek
ἄνειμι, ἐπανέρχομαι, ἀνέρχομαι, ἐπιβαίνω, ἀναρριχάομαι, εἰσαναβαίνω, ἀνέρπω, ἀνιμάω, ὀρειβατέω, ἐκπεράω