ἀμάχητος

ον
A. not to be foughtwith, unconquerable, S. Ph. 198 (lyr.).
II. not having fought, not having been in battle, X. Cyr. 6.4.14; ἀ. ὄλεθρος destruction without fighting, Lys. Fr. 71.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project