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
wonder: P. and V. ἔκπληξις, ἡ, θαῦμα, τό, θάμβος, τό (rare P.).
stupor: P. ἀναισθησία, ἡ.