1. Incapable of being ascended
   - unclimbable

Antonym: scalable

• complementation
• complete
• complete blood count
• complete fracture
• completed
• completely
• completeness
• completing
• completion
• complex
• complex absence
• complex body part
• complex conjugate
• complex fraction
• complex instruction set computer
• complex instruction set computing
• complex number
• complex quantity
• complex sentence
• complexifier
• complexify
• complexion
• complexional
• complexity
• complexly