dynamics >> /daɪˈnæmɪks/
Definition: [plural noun] The branch of mechanics concerned with the motion of bodies under the action of forces.
Example: The training allows astronauts to become familiar with the dynamics of body motion under weightless conditions.
Definition: [plural noun] The forces or properties which stimulate growth, development, or change within a system or process.
Example: the dynamics of changing social relations
Definition: [plural noun] The varying levels of volume of sound in different parts of a musical performance.
Example: Variety can also be obtained without affecting the musical substance simply by repeating a melody with different dynamics or instruments.