γαληναίος
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
Greek (Liddell-Scott)
γαληναίος: -α, -ον, =γαληνός, Ἀνθ. Π. 10. 21, κτλ.― Ἐπίρρ. –ως Σχόλ. εἰς Ὀδ. Η. 319.