Related Clues:

• Detached type
• Showing no pain
• Unemotional to a fault
• Indifferent to pleasure or pain
• Like Spock
• Even-keeled
• One who bites the bullet
• Rock's __ Dan
• Phlegmatic
• Bullet-biting type
• One who never cries 'Ow!'
• Immovable type
• Undemonstrative to the max
• Dispassionate person
• Seneca, for one