ἀμετάθετος
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.
English (LSJ)
ον,
A unalterable, immutable, κατάληψις, of knowledge, Zeno Stoic.1.20; of fate, Chrysipp.ib.2.264, cf. Plb.30.17.2; ἀκίνητα καὶ ἀ. OGI331 (Pergam.), etc. Adv. -τως, διακεῖσθαι D.S.1.83, cf. Ascl.in Metaph. 22.6. 2 Gramm., not inflected, A.D.Synt.322.1.