Strong's #82: adelos (pronounced ad'-ay-los)

from 1 (as a negative particle) and 1212; hidden, figuratively, indistinct:--appear not, uncertain.

Thayer's Greek Lexicon:

̓́

adēlos

1) not manifest, indistinct, uncertain, obscure

Part of Speech: adjective

Relation: from G1 (as a negative particle) and G1212

Usage:

This word is used 2 times:

 

Luke 11:44: "ye are as graves which appear not, and the men that walk"
1 Corinthians 14:8: "For if the trumpet give an uncertain sound, who shall prepare"