collaborate

英 [kə'læbəreɪt] 美[kə'læbəret]

• vi. 合作；勾结，通敌

1. work together on a common enterprise of project;

"The soprano and the pianist did not get together very well"

"We joined forces with another research group"

2. cooperate as a traitor;

"he collaborated with the Nazis when they occupied Paris"