cooperated

Cooperated is the past tense and past participle of the verb cooperate. It refers to working jointly with others toward a common goal, or to acting in accordance with requests or requirements from authorities or others. In practice, cooperation involves sharing information, coordinating actions, and aligning efforts to achieve efficiency, solve problems, or fulfill obligations. The term is widely used in business, government, research, and everyday life.

Cooperated with is the standard construction: for example, "The teams cooperated on the project," or "Residents cooperated with investigators." It can describe voluntary collaboration as well as compliance with procedures or requests. The word sits on a spectrum of related terms, with collaborate often signaling joint creative or scholarly effort, while cooperate can emphasize compliance or practical teamwork without necessarily contributing new ideas.

Etymology and related forms: Cooperated comes from the French coopérer and the Latin cooperatus, formed from com- ('together') and operare ('to work'). Related forms include cooperation (noun), cooperative (adjective or noun), and the base verb cooperate. Hyphenated spellings such as co-operate appear in some older texts but are largely replaced by cooperate in modern English. See also: cooperation, cooperative, collaborator.