unscalable
/ʌnˈskeɪləbəl/
adjective
- Impossible to climb or scale.
- The mountain's north face is nearly unscalable in winter.
- The castle was surrounded by an unscalable wall.
- They stared at the unscalable cliff, wondering how to proceed.
- Not able to be increased in size or capacity; not capable of being expanded or adapted for larger use.
- The company's old software system is unscalable and cannot handle more users.
- We need to replace this unscalable server with a more flexible one.
- Their business model proved unscalable beyond the local market.
Synonyms