Word: arrhtoj

Pronounce: ar'-hray-tos

Strongs Number: G731

Orig: from 1 (as a negative particle) and the same as 4490; unsaid, i.e. (by implication) inexpressible:--unspeakable. G1

Use: Adjective

Heb Strong:

1) unsaid, unspoken
2) unspeakable (on account of its sacredness)