levity /levˈi-ti/

1. Lightness of temper or conduct
2. Thoughtlessness
3. A trifling or frivolous tendency
4. Fickleness
5. Vain quality
6. Lightness of weight (archaic)

• unburnt
• unburrow
• unburrowed
• unburrowing
• unburrows
• unburthen
• unburthened
• unburthening
• unburthens
• unbury
• unburying
• unbusinesslike
• unbusy
• unbuttered
• unbutton
• unbuttoned
• unbuttoning
• unbuttons
• uncage
• uncaged
• uncages
• uncaging
• uncalculated
• uncalculating
• uncalled