stoic - STOW-ik - tending to remain unemotional esp. in times of adversity, impassive, stolid
Example: "A Times article referred to Obama as being remarkably stoic in his reaction to the 'orchestrated' disruptions at Town Hall meetings."
As a starter: and as a former teacher in English, I hope to add to reader's vocabulary by presenting a word a day in simple terms that anyone can understand - from current use in publications, radio,TV, etc. Remember: use a new word three times in a day and it's yours forever!