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
P. παρανόμως, P. and V. κακῶς, ἀδίκως, V. ἀνοσίως.
prosecute criminally, v.: Ar. and P. γράφεσθαι (acc.).