Strong's G411 — ἀνεκδιήγητος (adjective)
anekdiegetos (an-ek-dee-ay'-gay-tos) adj.
1. not expounded in full, i.e. indescribable
[from G1 (as a negative particle) and a presumed derivative of G1555]
KJV: unspeakable 
Root(s): G1, G1555 
Hebrew root: ἐκδιηγέομαι
Occurrences: 1