Sound check (7)
I believe the answer is:
staunch
I believe this is a double definition.
'sound' is the first definition.
(thesaurus)
'check' is the second definition.
(I know that staunch is a type of check)
(Other definitions for staunch that I've seen before include "Dependable; stop (flow)" , "Check" , "Loyal; restrict (a flow of blood)" , "Stop bleeding; trusty" , "way to limit bloodshed" .)