δυσαποσπάστως

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

Source

French (Bailly abrégé)

adv.
de façon à n'être pas facilement arraché.
Étymologie: δυσ-, ἀποσπάω.

Russian (Dvoretsky)

δυσαποσπάστως: с трудом отрываясь: δ. ἔχειν Plat., Diod. цепко держаться, крепко цепляться.