Noun

(responsibilities)

The state of being responsible, accountable, or answerable.

Responsibility is a heavy burden.

A duty, obligation or liability for which someone is held accountable.

Why didn't you clean the house? That was your responsibility !

The responsibility of the great states is to serve and not to dominate the world -

(military) The obligation to carry forward an assigned task to a successful conclusion. With responsibility goes authority to direct and take the necessary action to ensure success. (JP 1-02 Department of Defense Dictionary of Military and Associated Terms).

(military) The obligation for the proper custody, care, and safekeeping of property or funds entrusted to the possession or supervision of an individual. (JP 1-02 Department of Defense Dictionary of Military and Associated Terms).

Noun

(activities)

The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities.

Something done as an action or a movement.

Something done for pleasure or entertainment, especially one involving movement or an excursion.

* {{quote-magazine, date=2013-06-07, author=David Simpson

, volume=188, issue=26, page=36, magazine=(The Guardian Weekly) , title= Fantasy of navigation , passage=Like most human activities , ballooning has sponsored heroes and hucksters and a good deal in between. For every dedicated scientist patiently recording atmospheric pressure and wind speed while shivering at high altitudes, there is a carnival barker with a bevy of pretty girls willing to dangle from a basket or parachute down to earth.}}

Use (of internet, playstation, bank account etc.).