cooperate 《with》
join forces [hands] 《with》
【形式ばった表現】 unite one's efforts 《with》
【形式ばった表現】 make common cause 《with》
…と協力して
in cooperation [partnership, 【形式ばった表現】 concert] with…
協力的な
cooperative.
a collaborator.
読み方 きょうりょく
Cooperation; united efforts:(=する) to cooperate (with some one); to unite one's efforts (with some one); to pull together