In cold blood
Meaning
To perform an action, especially a violent one, with deliberate intention and a complete lack of emotion or remorse.
Origin
The chilling phrase "in cold blood" traces its roots back to ancient and medieval physiological theories that linked temperament and emotion to the body's humors and, specifically, to the temperature of one's blood. It was widely believed that blood, when heated by anger or passion, propelled spontaneous, impulsive acts. Conversely, a person whose blood remained 'cold' was thought to be devoid of such powerful emotions, acting with chilling detachment, calculation, and a deliberate lack of compassion. This coldness of blood became synonymous with a calm, premeditated cruelty, leading to the phrase's eventual association with the most heinous acts, particularly murder, committed without any heat of passion or remorse.
Examples
- The assassin carried out the hit in cold blood, showing no remorse or hesitation as he completed his mission.
- Her decision to betray her long-time friends was made in cold blood, a calculated move for personal gain without a shred of guilt.