#1830 ἐξερευνάω [ἐξεραυνάω] exereunao {ex-er-yoo-nah'-o}

 from G1537 and G2045; TDNT - 2:655,255; v

—Greek Word Study (Transliteration-Pronunciation Etymology & Grammar)

 1) to search out, search anxiously and diligently

 ++++
 To search after, thoroughly investigate (first used to tell
 of a dog sniffing out something with his nose). The prophets
 searched to find out the time of Messiah's appearance.

—Thayer's (New Testament Greek-English Lexicon)

—Strong's (Greek Dictionary of the New Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - search diligently 1; 1

—Exhaustive Concordance (KJV Translation Frequency & Location)