-slə̇s adjective
Etymology: remorse + -less
1. : being without remorse : pitiless , merciless
a monster of … remorseless cruelty — Leslie Stephen
2. : continuing without lessening or break : relentless
the drive of technology was so remorseless that younger economists … turned from philosophy to research — C.A. & Mary Beard
• re·morse·less·ly adverb
• re·morse·less·ness noun -es