Control or hold in check (8)
I believe the answer is:
restrain
I believe this is a double definition.
'control' is the first definition.
(I know this)
'hold in check' is the second definition.
(thesaurus)
(Other definitions for restrain that I've seen before include "Arrest - confine - subdue" , "Control - check" , "Keep in check" , "Stop" , "bar" .)