Do exhaustive research (5)
I believe the answer is:
delve
(Other definitions for delve that I've seen before include "Dig - investigate" , "Hollow" , "Search deeply for information" , "Reach down and search" , "Dig - research deeply" .)
I believe the answer is:
delve
(Other definitions for delve that I've seen before include "Dig - investigate" , "Hollow" , "Search deeply for information" , "Reach down and search" , "Dig - research deeply" .)