die Tätigkeit

Aktion refers to an organized Tätigkeit with a specific goal, whereas Tätigkeit also encompasses regular occupation and more general forms of work.

Tätigkeit usually emphasizes regular or professional employment, whereas Aktivität also includes one-time or leisure-related pursuits.

Arbeit can refer to a specific Tätigkeit carried out as part of employment, whereas Tätigkeit is the broader superordinate term for actions and occupations performed.

Tätigkeit refers more generally to an activity being carried out; by contrast, a Aufgabe is usually a specific unit to be completed within a Tätigkeit.

A Beruf is usually a long-term Tätigkeit that often includes training and the purpose of earning a living.