Strong's G198 — ἀκριβόω (verb)
akriboo (ak-ree-boh'-o) v.
1. to be exact, i.e. ascertain
[superlative of akribes (a derivative of the same as G206)]
KJV: enquire diligently 
Root(s): G206 
See also: G196, G197, G199 
Hebrew root: ἄκρον
Occurrences: 2