[hahrt-lis] /ˈhɑrt lɪs/
unfeeling; unkind; unsympathetic; harsh; cruel:
heartless words; a heartless ruler.
Archaic. lacking courage or enthusiasm; spiritless; disheartened.
unkind or cruel; hard-hearted
Old English heortleas “dispirited, dejected;” see heart + -less. In Middle English with expanded senses “lacking in courage; foolish; listless; half-hearted; sluggish.” Sense of “callous, cruel” is not certainly attested before Shelley used it in 1816. Literal meaning “lacking a heart, lifeless” (mid-15c.) is rare. Related: Heartlessly; heartlessness.
- Heart-lung machine
[hahrt-luhng] /ˈhɑrtˈlʌŋ/ noun 1. a device through which blood is shunted temporarily for oxygenation during surgery, while the heart or a lung is being repaired. noun 1. a machine used to maintain the circulation and oxygenation of the blood during heart surgery heart-lung machine n. An apparatus through which the blood is temporarily diverted, especially […]
- Heart not in it
see under heart in it
noun 1. a short novel (1902) by Joseph Conrad. (1902) A short novel by Joseph Conrad. It concerns a seafarer, Marlow, who is sent to the interior of Africa in search of a “mad adventurer” named Kurtz. The book’s title refers both to the location of the story and to the evil and darkness in […]
- Heart of gold
A very kind and good nature, as in Bill is very generous; he has a heart of gold. This expression alludes to gold in the sense of “something valued for its goodness.” [ Late 1500s ]