energy
Definition
The capacity of a physical system to perform work, as measured by the ability to generate heat, light, or motion, typically quantified in joules.
Vigor, liveliness, or intensity of expression, action, or feeling; the strength required for sustained physical or mental activity.
A source of power or fuel derived from physical or chemical resources, such as electricity, fossil fuels, or renewables.
Examples
After chugging that energy drink, he bounced around the office like a caffeinated pinball.
The toddler's infinite energy turned bedtime into a full-contact wrestling match.
Switching to solar energy saved them money, but now their roof looks like a spaceship landing pad.
Her speech radiated such positive energy that even the grumpy cat in the back row purred approval.