Strong's #731: arrhetos (pronounced ar'-hray-tos)

from 1 (as a negative particle) and the same as 4490; unsaid, i.e. (by implication) inexpressible:--unspeakable.

Thayer's Greek Lexicon:

̓́̓̔

arrhētos

1) unsaid, unspoken

2) unspeakable (on account of its sacredness)

Part of Speech: adjective

Relation: from G1 (as a negative particle) and the same as G4490

Usage:

This word is used 1 times:

 

2 Corinthians 12:4: "paradise, and heard unspeakable words, which it is not lawful"