cooperate

Etymology

Originated 1595–1605 from Late Latin cooperatus (“work with”). See co- + operate. Displaced native Old English efnwyrċan.

verb

1. (intransitive) To work or act together, especially for a common purpose or benefit.
   In polling by the Pew Research Center in November 2008, fully half the respondents thought the two parties would cooperate more in the coming year, versus only 36 percent who thought the climate would grow more adversarial. November 7, 2012, Matt Bai, “Winning a Second Term, Obama Will Confront Familiar Headwinds”, in New York Times
2. (intransitive) To allow for mutual unobstructed action
3. (intransitive) To function in harmony, side by side
4. (intransitive) To engage in economic cooperation.