Strong's G1830 — ἐξερευνάω (verb)
exereunao (ex-er-yoo-nah'-o) v.
1. to explore (figuratively)
[from G1537 and G2045]
KJV: search diligently 
Root(s): G1537, G2045 
Hebrew root: ἐρευνάω
Occurrences: 1