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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
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If the proposal is sensible and reasonable they should cooperate.
Local people decided to cooperate with the authorities against the rebels.
The company has agreed to cooperate in the development of this technology.
They threatened to harm him if he didn’t cooperate.
This is the British English definition of cooperate. View American English definition of cooperate.