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

See also: nonchalant

• behaviourism
• behaviourist
• behaviouristic
• behaviouristic psychology
• behead
• beheaded
• beheading
• behemoth
• behest
• behind
• behind bars
• behind-the-scenes
• behindhand
• Behmen
• Behmenism
• behold
• beholden
• beholder
• beholding
• behoof
• behoove
• behove
• Behrens
• Behring
• beige