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
[Seite 280] ὁ, = ξέσις, Hesych.
ξόος: ὁ, = ξυσμός, Ἡσύχ., ἀλλ’ ἐν τῷ κειμένῳ: «ξοός· ξυσμός· ὁλκός».