1. Incapable of being ascended
   - unclimbable

Antonym: scalable

• paracosm
• parade
• parade ground
• parader
• paradiddle
• paradigm
• paradigmatic
• Paradisaeidae
• paradisaic
• paradisaical
• paradisal
• paradise
• paradise flower
• paradise tree
• Paradisea liliastrum
• paradisiac
• paradisiacal
• paradox
• paradoxical
• paradoxical sleep
• paradoxically
• Paradoxurus
• paraduodenal smear
• paraenesis
• paraesthesia