an act, the action, of bouncing

spring

the measurable influence that causes an object to move or move faster or that makes a material or object able to bear weight

physical energy, power

the first or introductory step or move

eagerness to do something

(an act of) changing position; a main division of a musical work

motion, activity

the qualities that make up a person's character

person's character, traits

(in living things) the ability to do or act; energy that can be used to do work; authority; influence

ability, competence

mental or physical strength; energy

power, energy

(an amount of) electrical force measured in volts

physical ability, capacity