1. Vacuously or complacently and unconsciously foolish
   - fatuously

See also: inane

• Otaria
• Otaria Byronia
• Otariidae
• otc
• OTC market
• OTC security
• OTC stock
• Othello
• other
• other half
• other than
• otherness
• others
• otherwise
• otherworld
• otherworldliness
• otherworldly
• Othman I
• Otho
• Otho I
• Otho of Lagery
• othonna
• otic
• otic ganglion
• Otides