Sound; considerable (7)
I believe the answer is:
healthy
I believe this is a double definition.
'sound' is the first definition.
(I know that sound can be written as healthy)
'considerable' is the second definition.
(thesaurus)
(Other definitions for healthy that I've seen before include "Fit, in sound physical shape" , "Free from infirmity or disease" , "In the pink" , "In good shape, not ill" , "In good condition" .)