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
blind: P. and V. τυφλοῦν (Plato), ἐκτυφλοῦν (Xen., also Ar.).
Met., lead astray: P. and V. παράγειν, ἀπατᾶν, ἐξαπατᾶν; see deceive.
