1. Vacuously or complacently and unconsciously foolish
   - inanely

See also: fatuous

• lubricating oil
• lubricating substance
• lubricating system
• lubrication
• lubricator
• lubricious
• lubricity
• lubricous
• Lubumbashi
• Lucania
• Lucanidae
• lucarne
• Lucas
• Luce
• lucency
• lucent
• lucerne
• Luchino Visconti
• Luciano Pavarotti
• lucid
• lucidity
• lucidly
• lucidness
• lucifer
• luciferin