Related Clues:

• One who never cries 'Ow!'
• Immovable type
• Undemonstrative to the max
• Luke warm
• Dispassionate person
• At room temperature
• Seneca, for one
• Like old bathwater
• Unemotional thinker
• Devoid of emotion
• Hard to rattle
• Showing little emotion
• Not easily flapped
• Somewhat warm
• Fairly weak