cooperate
co.op.er.ate \ko--'a:p-(*-).ra-t\ \-.ra-t-*t\ vi [LL cooperatus, pp. of cooperari, fr. L co- + operari t]o work - more at OPERATE 1: to act or work with another or others 2: to associate with another or others for mutual often economic benefit - co.op.er.a.tor n