ἀμετάθετος

A. unalterable, immutable, κατάληψις, of knowledge, Zeno Stoic. 1.20; of fate, Chrysipp.ib.2.264, cf. Plb. 30.17.2; ἀκίνητα καὶ ἀ. OGI 331 (Pergam.), etc. Adv. ‐τως, διακεῖσθαι D.S. 1.83, cf. Ascl. in Metaph. 22.6.

2. Gramm., not inflected, A.D. Synt. 322.1.