Usage: 3 forms in 3 verses
Form Translated As     In Verse(s)
αμύθητοσ untold LXX.Job.41.30
αμύθητα an untold LXX.Job.8.7
αμυθήτων untold LXX.Job.36.28

Liddell-Scott-Jones

ἀμύθητος (amuthētos) untold G:A

ἀμύθητος [], ον,

unspeakable, especially unspeakably great, untold, χρήματα[Refs 4th c.BC+]