δυσαποκατάστατος
From LSJ
μὴ ἐν πολλοῖς ὀλίγα λέγε, ἀλλ΄ ἐν ὀλίγοις πολλά → don't say little in many words, but much in a few words (Stobaeus quoting Pythagoras)
English (LSJ)
ον,
A hard to restore, M.Ant.11.8, Gal.14.792. II hard to recover from, ὀργαί Phld.Ir.p.63 W.
German (Pape)
[Seite 676] schwer wieder herzustellen; M. Ant. 11, 8; Galen.