1. In a composed and unconcerned manner
   - coolly, nervelessly 
2. In an unconcerned manner
   - casually

See also: nonchalant

• battlemented
• battler
• battleship
• battlesight
• battlewagon
• battue
• batty
• Batu Khan
• batwing
• bauble
• baud
• baud rate
• Baudelaire
• Bauhaus
• Bauhinia
• Bauhinia monandra
• Bauhinia variegata
• baulk
• baulk-line
• baulker
• baulking
• baulky
• Baum
• bauxite
• bauxitic