Power required for doing work or action (6)
I believe the answer is:
energy
(Other definitions for energy that I've seen before include "Verve" , "Healthy capacity for vigorous activity" , "Vivacity" , "Dynamism" , "Zeal" .)
I believe the answer is:
energy
(Other definitions for energy that I've seen before include "Verve" , "Healthy capacity for vigorous activity" , "Vivacity" , "Dynamism" , "Zeal" .)