12/14/12 healthy Word of the Day - Energy by Fonde Bridges

Energy -

1.  The capacity for work or vigorous activity; vigor; power.
2.  a. Exertion of vigor or power.
     b. Vitality and intensity of expression.
3.  a. Usable heat or power.
     b. A source of usable power, such as petroleum or coal.
4.  The capacity of a physical system to do work.
5.  Intensity or vitality of action or expression; forcefulness.
6.  Capacity or tendency for intense activity; vigour
7.  Vigorous or intense action; exertion.