Nimble — energetic (9)
I believe the answer is:
sprightly
I believe this is a double definition.
'nimble' is the first definition.
(thesaurus)
'energetic' is the second definition.
(thesaurus)
(Other definitions for sprightly that I've seen before include "Moving nimbly" , "Vivacious" , "Active" , "Brisk" , "Lively" .)