Apparently from ereo (through the idea of inquiry); to seek, i.e. (figuratively) to investigate -- search.

see GREEK ereo

ἐραυνᾷ (erauna) − 1 Occurrence

ἐραυνᾶτε (eraunate) − 1 Occurrence

ἐραύνησον (eraunēson) − 1 Occurrence

ἐραυνῶν (eraunōn) − 2 Occurrences

ἐραυνῶντες (eraunōntes) − 1 Occurrence