Direct opposites:
* Suppress: This implies actively stopping ideas from coming to the surface.
* Ignore: This implies not paying attention to ideas or solutions.
* Reject: This implies dismissing ideas outright.
Other options:
* Stagnate: This suggests a lack of creative energy or new ideas.
* Stalemate: This implies a situation where progress is blocked.
* Conform: This suggests following established practices rather than thinking outside the box.
* Dissent: This implies disagreeing with existing ideas, potentially hindering progress.
The best antonym will depend on the specific situation and the intended meaning.