1. Not able to be ascertained; resisting discovery
   - unascertainable

See also: indeterminable, undeterminable

• San Juan Mountains
• San Luis Potosi
• San Marinese
• San Marino
• San Mateo
• San Pablo
• San Pedro Sula
• San Salvador
• San Sebastian
• Sana
• Sana'a
• sanatarium
• sanative
• sanatorium
• sanatory
• sanbenito
• Sanchez
• sanctification
• sanctified
• sanctify
• sanctimonious
• sanctimoniously
• sanctimoniousness
• sanctimony
• Upper Avon River