cold-blooded
adjective
cold-blood·ed ˈkōl(d)-ˈblə-dəd 
1
a
: done or acting without consideration, compunction, or clemency
cold-blooded murder
b
: matter-of-fact, emotionless
a cold-blooded assessment
2
: having cold blood
specifically : having a body temperature not internally regulated but approximating that of the environment
3
or coldblood
ˈkōl(d)-ˈbləd
: of mixed or inferior breeding 4
: noticeably sensitive to cold
cold-bloodedly adverb
cold-bloodedness noun
Synonyms
- affectless
- callous
- case-hardened
- compassionless
- desensitized
- hard
- hard-boiled
- hard-hearted
- heartless
- indurate
- inhuman
- inhumane
- insensate
- insensitive
- ironhearted
- merciless
- obdurate
- pachydermatous
- pitiless
- remorseless
- ruthless
- slash-and-burn
- soulless
- stony
- stoney
- stonyhearted
- take-no-prisoners
- thick-skinned
- uncharitable
- unfeeling
- unmerciful
- unsparing
- unsympathetic
See all Synonyms & Antonyms 
Word History
First Known Use
1606, in the meaning defined at sense 2
Kids Definition
cold-blooded
adjective
cold-blood·ed
ˈkōld-ˈblə-dəd
1
: having a body temperature that varies with the temperature of the environment
Frogs are cold-blooded animals.
2
: lacking or showing a lack of normal human feelings
a cold-blooded criminal
Medical Definition
cold-blooded
adjective
cold-blood·ed ˈkōl(d)-ˈbləd-əd
: having a body temperature not internally regulated but approximating that of the environment : poikilothermic
cold-blooded amphibians and reptiles
cold-blooded
adjective
1
as in ruthless
having or showing a lack of sympathy or tender feelings a cold-blooded criminal who never once showed an ounce of mercy to his victims Synonyms & Similar Words
Relevance
- ruthless
- merciless
- callous
- heartless
- remorseless
- pitiless
- brutal
- cruel
- vicious
- inhuman
- unfeeling
- stony
- soulless
- oppressive
- hard
- inhumane
- malicious
- compassionless
- hateful
- unmerciful
- unsympathetic
- insensitive
- abusive
- harsh
- tough
- obdurate
- affectless
- insensate
- uncharitable
- savage
- stern
- unsparing
- grim
- indurate
- hard-hearted
- take-no-prisoners
- pachydermatous
- desensitized
- hard-boiled
- case-hardened
- thick-skinned
- severe
- thoughtless
- uncaring
- ironhearted
- slash-and-burn
- mean
- boorish
- unthinking
- malevolent
- unfriendly
- spiteful
- inconsiderate
- cold
- stonyhearted
- virulent
- heedless
- rough
- ungentle
- stoney
- unloving
- bestial
- brutish
- barbarous
- disagreeable
- surly
- hard-bitten
- jackbooted
- acrimonious
- ill-tempered
- sledgehammer
- rancorous
- knock-down-and-drag-out
- rough-and-tumble
- ironfisted
- frosty
- ironhanded
- knock-down, drag-out
- evil-minded
- heavy-handed
- ill-natured
- austere
Antonyms & Near Antonyms
- sympathetic
- compassionate
- warm
- merciful
- humane
- charitable
- sensitive
- benevolent
- kindhearted
- warmhearted
- gentle
- kind
- softhearted
- mild
- kindly
- benignant
- tenderhearted
- friendly
- lenient
- indulgent
- tender
- gracious
- affectionate
- cordial
- tolerant
- good-natured
- loving
- good-tempered
- understanding
- fond
- clement
2
as in icy
lacking in friendliness or warmth of feeling the cold-blooded selfishness shown by the miser when confronted by people in need Synonyms & Similar Words
- icy
- cold
- frigid
- chilly
- cool
- reserved
- arctic
- chill
- frozen
- brittle
- glacial
- cold-eyed
- unsympathetic
- detached
- unfriendly
- clammy
- coldhearted
- gelid
- frosty
- pitiless
- heartless
- antiseptic
- hard-eyed
- wintry
- uncaring
- unfeeling
- unemotional
- coldish
- bloodless
- soulless
- uncordial
- dispassionate
- wintery
- aloof
- hard-hearted
- undemonstrative
- unresponsive
- indifferent
- uninterested
- apathetic
- impersonal
- antisocial
- standoffish
- offish
- kindless
- unenthusiastic
- unsociable
- unsocial
Antonyms & Near Antonyms
- sympathetic
- warm
- friendly
- genial
- happy
- warm-blooded
- compassionate
- cordial
- kind
- hearty
- emotional
- warmhearted
- expressive
- demonstrative
- kindhearted
- enthusiastic
- passionate
- eager
3
as in stoic
not feeling or showing emotion a cold-blooded assessment of the situation showed that the company needed either to lay off workers or go bankrupt Synonyms & Similar Words
- stoic
- phlegmatic
- unemotional
- emotionless
- calm
- passionless
- impassive
- enigmatic
- stolid
- apathetic
- detached
- bland
- affectless
- undemonstrative
- stoical
- numb
- cold
- dispassionate
- reserved
- impassible
- enigmatical
- dry
- collected
- composed
- cool
- taciturn
- unflappable
- pitiless
- imperturbable
- empty
- unmoved
- aloof
- deadpan
- expressionless
- objective
- inscrutable
- wooden
- bloodless
- unsentimental
- unfeeling
- thoughtless
- indifferent
- inexpressive
- impersonal
- blank
- unconcerned
- reticent
- stone-faced
- unresponsive
- inconsiderate
- straight-faced
- vacant
- hard-hearted
- impenetrable
- insensible
Antonyms & Near Antonyms
- passionate
- emotional
- impassioned
- fervent
- demonstrative
- vehement
- fervid
- enthusiastic
- passional
- zealous
- fiery
- hot-blooded
- ardent
- burning
- sentimental
- dramatic
- flaming
- sympathetic
- blazing
- warm-blooded
- melodramatic
- glowing
- compassionate
- gung ho
- mawkish
- mushy
- maudlin
- responsive
- histrionic
- perfervid
- reactive
- sensitive
- overheated
- red-hot
- overemotional
- gushing
4
as in mixed
or coldblood being offspring produced by parents of different races, breeds, species, or genera he may not be as fancy as the other horses they own, but that cold-blooded gelding is safe and gentle Synonyms & Similar Words
- mixed
- hybrid
- crossbred
- cross
- mongrel
- crossed
- half-bred
- grade
- trihybrid
- hybridized
- dihybrid
- interbred
- outcrossed
Antonyms & Near Antonyms
- blooded
- thoroughbred
- purebred
- inbred
- pedigree
- pedigreed
- full-blooded
- full-blood
- straightbred
- linebred