1. Free from emotional agitation or nervous tension
   - unflurried, unflustered, unruffled

See also: composed

• birdbrain
• birdbrained
• birdcage
• birdcage mask
• birdcall
• birder
• birdfeeder
• birdhouse
• birdie
• birdlike
• birdlime
• birdnest
• birdnesting
• birdseed
• birdseed grass
• birdsong
• birdwatch
• birefringence
• birefringent
• bireme
• biretta
• biriani
• birken
• birl
• birle