General Antonyms:
* Compete: To strive to surpass or outdo another in a contest or endeavor.
* Isolate: To separate or cut off from others.
* Divide: To separate into parts or groups.
* Antagonize: To make hostile or unfriendly.
* Oppose: To be against something or someone.
Contextual Antonyms:
* Work independently: Instead of working together, individuals work on their own.
* Disrupt: To break up or interrupt the collaboration process.
* Undermine: To weaken or destroy the efforts of the collaboration.
* Sabotages: To intentionally hinder or disrupt the collaboration.
The most appropriate antonym will depend on the specific situation and what aspect of collaboration you're trying to express the opposite of.