1The team encountered an insuperable problem in the project's final stage, which ultimately led to its cancellation.
2Despite their best efforts, the climbers found the mountain's steep terrain to be an insuperable barrier to reaching the summit.
3The lack of funding proved to be an insuperable obstacle for the startup, forcing it to shut down operations.
4Philosophers have long grappled with the insuperable challenge of reconciling free will with determinism.
5The novel explores the insuperable nature of human suffering, which can sometimes seem too great for individuals to bear.