Bore with exercise (5)
I believe the answer is:
drill
I believe this is a double definition.
'bore' is the first definition.
(thesaurus)
'exercise' is the second definition.
('drill' can be a synonym of 'exercise')
'with' is the link.
(Other definitions for drill that I've seen before include "Stout cotton cloth" , "Seed machine; baboon" , "Exercise by repeated practice - bore" , "Dental assistant" , "strong twilled cotton" .)