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

See also: nonchalant

• sounding line
• sounding rocket
• soundless
• soundlessly
• soundlessness
• soundly
• soundman
• soundness
• soundproof
• soundtrack
• soup
• soup bowl
• soup du jour
• soup kitchen
• soup ladle
• soup plate
• soup up
• soup-strainer
• soupfin
• soupfin shark
• soupiness
• soupspoon
• soupy
• soupçon
• sour