Defend, conserve (7)
I believe the answer is:
protect
I believe this is a double definition.
'defend' is the first definition.
(I know that defend is a more specific form of the action protect)
'conserve' is the second definition.
(thesaurus)
(Other definitions for protect that I've seen before include "Guard" , "Keep safe" , "Shield from danger" , "Keep from danger" , "Defend" .)