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

Derived forms: mysteriousnesses

• alkanet
• alkapton
• agone
• agonic line
• Agonidae
• agonise
• agonised
• agonising
• agonisingly
• agonist
• agonistic
• agonistical
• agonize
• agonized
• agonizing
• agonizingly
• Agonus
• Agonus cataphractus
• agony
• agony aunt
• agony column
• agora
• agoraphobia
• agoraphobic
• agouti