Strong's G1231 — διαγινώσκω (verb)
diaginosko (dee-ag-in-o'-sko) v.
1. to know thoroughly, i.e. ascertain exactly
[from G1223 and G1097]
KJV: (would) enquire, know the uttermost 
Root(s): G1223, G1097 
Hebrew root: γινώσκω
Occurrences: 2