noun, na-adjective
utterly callous; atrociously brutal; cruel and inhuman
Strong literary or emphatic term describing extreme cruelty and lack of compassion. Often used in critical or dramatic contexts.
彼の残忍非情な行動は、多くの人を傷つけた。
His utterly callous actions hurt many people.
その事件は残忍非情な犯行として報道された。
The incident was reported as an atrociously brutal crime.
Compound of 残忍 (cruel, brutal) and 非情 (heartless, unfeeling). The exact historical derivation is uncertain, but the combination creates an emphatic term for extreme cruelty.