coldblooded
Lacking internal thermoregulation
Coldblooded describes animals whose body temperature varies with their environment—reptiles, fish, amphibians.
The figurative sense dominates: a coldblooded act is calculated and merciless, done without emotion or hesitation: a coldblooded killer, coldblooded murder.
The spelling varies: cold-blooded, coldblooded, cold blooded.
Lacking any compassion
- schemingCrafty and calculating
- manipulativeSkilled at controlling others
- cunningSly, scheming cleverness
- premeditatedPlanned before acting
merciless · deliberate · heartless · remorseless · pitiless · callous · unscrupulous · methodical
Temperature set by surroundings
- reptileCold-blooded scaled vertebrate
- snakeLimbless scaled reptile
- lizardFour-legged scaled reptile
- crocodileLarge semiaquatic tropical reptile
alligator · turtle · gecko · iguana · chameleon · amphibian · fish · scales
Apart or uninvolved
- impassiveWithout visible emotion
- unfeelingWithout compassion or emotion
- emotionlessLacking any sentiment
- stoicUncomplaining endurer of hardship
dispassionate · apathetic · indifferent · aloof · unmoved · composed · cool · controlled
ruthless
Lacking any compassion
- schemingCrafty and calculating
- manipulativeSkilled at controlling others
- cunningSly, scheming cleverness
premeditated · merciless · deliberate · heartless · remorseless · pitiless · callous · unscrupulous · methodical · strategic
ectothermic
Temperature set by surroundings
crocodile · alligator · turtle · gecko · iguana · chameleon · amphibian · fish · scales · herpetology
detached
Apart or uninvolved
- impassiveWithout visible emotion
- unfeelingWithout compassion or emotion
- emotionlessLacking any sentiment
stoic · dispassionate · apathetic · indifferent · aloof · unmoved · composed · cool · controlled · reserved
coldbloodedwarmhearted
Affectionate and sympathetic
compassionate · tender · caring · feeling · empathetic
coldbloodedmerciful
Disposed toward forgiveness
humane · compassionate · forgiving · benevolent · kind
cold, blood, coldness, blooded, cold-blooded, coolheaded, coldhearted, blueblood, blue-blooded