1. Incapable of being ascended
   - unclimbable

Antonym: scalable

• South of Houston
• South Pacific
• South Platte
• South Platte River
• South Pole
• South Sea
• South Sea Islands
• south side
• south southwest
• South Temperate Zone
• South Vietnam
• South West Africa
• south wind
• South Yorkshire
• South-African yellowwood
• south-central
• South-Central Dravidian
• south-polar
• south-seeking pole
• south-southeast
• Southampton
• southbound
• Southdown
• southeast
• Southeast Asia