cooperative
Pronunciation: /kəʊˈɒp(ə)rətɪv/
(also co-operative)
adjective
- involving mutual assistance in working towards a common goal: every member has clearly defined tasks in a cooperative enterprise
- willing to be of assistance: they have been extremely considerate, polite, and cooperative
- (of a farm, business, etc.) owned and run jointly by its members, with profits or benefits shared among them.
noun

Origin:
early 17th century: from late Latin cooperativus, from Latin cooperat- 'worked together', from the verb cooperari (see cooperate)