The word found after unscrambling energy means that (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs, forceful exertion, enterprising or ambitious drive, an imaginative lively style (especially style of writing), a healthy capacity for vigorous activity, any source of usable power, the federal department responsible for maintaining a national energy policy of the United States; created in 1977, .