Mobility (noun)

1. The ability to move or be moved freely and easily.
2. The ability to move or change easily from one situation, place, or form to another.

Origin:

Middle english mobilite, from latin mobilis movable, from movēre to move.

Examples:

1. He was impressed by her mobility despite her advanced age.
2. The city's excellent public transportation system improves the mobility of its citizens.
3. The new car design will enhance the mobility of disabled drivers.
4. Mobility is an important factor in determining a person's quality of life.
5. He was very proud of his daughter's mobility and athleticism.