cooperating

present participle and gerund of cooperate

(intransitive) To work or act together, especially for a common purpose or benefit.
(intransitive) To allow for mutual unobstructed action.
(intransitive) To function in harmony, side by side.
(intransitive) To engage in economic cooperation.
(jargon, transitive) To obtain the cooperation of (a potential witness); to turn (someone) into a cooperating witness.