1. Not easily perturbed or excited or upset; marked by extreme calm and composure
   "unflappable in a crisis"
   - imperturbable

See also: composed

Encyclopedia: Unflappable

• mercantile
• mercantile agency
• mercantile establishment
• mercantile law
• mercantile system
• mercantilism
• mercaptan
• mercaptopurine
• Mercator
• Mercator projection
• Mercator's projection
• Merce Cunningham
• Mercedario
• Mercenaria
• Mercenaria mercenaria
• mercenary
• mercer
• mercerise
• mercerised
• mercerize
• mercerized
• merchandise
• merchandiser
• merchandising
• merchandize