cooperate

B2 · Upper Intermediate

v. to do what someone asks you to do, especially an official or a person in charge.

v. to comply with the requests or instructions of others, particularly those in authority.

日本語:協力する※

“The witness agreed to cooperate with the police and told them everything she saw.”

“Despite initial hesitation, the suspect eventually chose to cooperate fully with the investigation in exchange for a reduced sentence.”

C1 · Advanced Literary

v. when things work well together to produce a good result.

v. to function or operate in harmony; used of inanimate objects or abstract forces that align to produce a specific outcome.

日本語:連携する※

“The weather did not cooperate, and our outdoor party was ruined by rain.”

“For the experiment to succeed, every variable must cooperate perfectly, as even a minor fluctuation in temperature could invalidate the results.”

C2 · Proficiency Law Technical · American English

v. to persuade someone to help the police or a court, usually by offering them a deal.

v. to obtain the formal assistance of a potential witness, often by offering legal incentives.

“The prosecutor spent months trying to cooperate the driver of the getaway car.”

“Federal agents successfully cooperated the lead accountant, whose testimony provided the evidence needed to dismantle the entire criminal enterprise.”