remorseless

adj.

（尤指不愉快的情形）持续恶化的；残酷的；无情的；无同情心的

1. Within the hardened carapace beats the heart of a remorseless killer.
   他坚固的外壳下跳动的是一颗冷血的杀手之心。

A Remorseless, Relentless Enemy
Remorseless apology: Analysing a political letter
So remorseless a havoc:of dolphins, whales, and men
The Remorseless Algebra of a Deflationary Death Spiral
The remorseless sea and coastal property : environmental law
The Remorseless Power of Incumbency in Fiji’s September 2014 Election
Iraq bleeds: the remorseless rise of violence and displacement
"So Young and so Untender": Remorseless Children and the Expectations of the Law
Street-Gang Mentality A Mosaic of Remorseless Violence and Relentless Loyalty
Prosper Despine's Psychologie naturelle and the discovery of the remorseless criminal in nineteenth-century France