Englishfor English speakers
activity
Noun
—
When a person or animal has activity, it is active or lively.
The sleeping dog did not show much activity.
—
When you have a function to do, you have an activity.
The child has many after-school activities.
She participates in women's rights activities.
based
—
adjective
having a base
firmly based ice
—
adjective
having a base of operations (often used as a combining form)
a locally based business
an Atlanta-based company
carrier-based planes
system
Noun
—
A group of things that work together; a way of doing something.
This coloured paper is part of my system for keeping lists of people.