1. The state or quality of being mysterious 
2. Something mysterious; a mystery

Derived forms: mysteriousnesses

• aphorist
• aphoristic
• aphoristically
• aphorize
• aphotic
• Aphriza
• Aphriza virgata
• aphrodisia
• aphrodisiac
• aphrodisiacal
• Aphrodite
• Aphrophora
• Aphrophora saratogensis
• aphtha
• aphthous
• aphthous ulcer
• Aphyllanthaceae
• Aphyllanthes
• Aphyllophorales
• aphyllous
• API
• Apia
• Apiaceae
• apian
• apiarian