ἐρυμνότης
From LSJ
ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → for extreme diseases, extreme methods of cure, as to restriction, are most suitable (Corpus Hippocraticum, Aphorisms 1.6.2)
English (LSJ)
ητος, ἡ,
A strength or security of a place, X.Cyr.6.1.23 ; τῶν τειχῶν Arist.Pol.1330b37 ; αἱ ἐ. τῶν Ἄλπεων the difficulties of passing them, Plb.3.47.9, etc.
German (Pape)
[Seite 1037] ητος, ἡ, die Festigkeit eines Ortes, Befestigung, Xen. Cyr. 6, 1, 23; τῶν τειχέων Arist. pol. 7, 11; von den Alpen, Pol. 3, 47, 9. 48, 5, Unzugänglichkeit, Schroffheit.