cooperate
verb [ I ]
( UK also co-operate) uk/kəʊˈɒpəreɪt/ usto agree to work with another company, organization, or country in order to achieve something:
Large corporations have a duty to cooperate in order to protect the environment.
cooperate (with sb) on/in sth We are cooperating with another company on this joint venture.
cooperate in doing sth/ to do sth They have agreed to cooperate in distributing products and providing support services.
to be helpful by doing what someone asks you to do:
cooperate with sb A spokesman said the company would cooperate fully with the regulatory authorities.