A compound Greek verb meaning to search out carefully, to investigate thoroughly, to explore with diligence. The prefix ex- intensifies ereunao (to search/investigate). Used in 1 Peter 1:10 to describe the prophets' diligent searching of the grace that was to come.
Peter's use of exereunao reveals the prophets as diligent theological researchers — men who searched their own Spirit-inspired oracles, trying to understand who the Messiah would be and when He would suffer. They were serving not themselves but future believers with their careful investigation. This models the Christian calling to be students of Scripture — not casual readers but diligent searchers who work through the text with effort and reverence. The Spirit who inspired the prophets' searching also illumines our searching today.