Question

noun1 the strength and vitality required for sustained physical or mental activity: 2 power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines: 3 Physics the property of matter and radiation which is manifest as a capacity to perform work (such as causing motion or the interaction of molecules).

Accepted Answer

energy

Front	noun 1 the strength and vitality required for sustained physical or mental activity: 2 power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines: 3 Physics the property of matter and radiation which is manifest as a capacity to perform work (such as causing motion or the interaction of molecules).
Back	energy

Physical Work Noun Strength Vitality Required Sustained Mental