Strong's G82 — ἄδηλος (adjective)
adelos (ad'-ay-los) adj.
1. hidden
2. (figuratively) indistinct
[from G1 (as a negative particle) and G1212]
KJV: appear not, uncertain 
Root(s): G1, G1212 
Hebrew root: δῆλος
Occurrences: 2