1. impossible to overcome or surmount
Usage: formal

Examples

• The mountain presented an insuperable challenge to the inexperienced climbers.
• Despite their efforts, the team faced insuperable obstacles in completing the project on time.
• The language barrier seemed insuperable at first, but with practice it became manageable.
• Financial difficulties created what appeared to be insuperable problems for the small business.
• The fortress was protected by insuperable walls that had never been breached.
• She refused to accept that any problem was truly insuperable.