remorseless

The word 'remorseless' is built upon the noun 'remorse,' which originates from the Latin verb remordēre, meaning "to bite back" or "to torment." This vivid metaphor—of guilt or regret gnawing at one's conscience—passed through Old French before entering English. The suffix '-less,' of Germanic origin, is added to indicate the absence of that very feeling. Therefore, the literal construction "without the bite of conscience" evolved logically into its modern abstract meanings: first describing a person devoid of pity or guilt for their actions, and by extension, describing any force that continues without softening or relenting.

Structure: remorse + less remorse: From Latin remorsus (a biting back, torment), via Old French. In this word, it functions as the core noun root meaning "deep regret or guilt." less: From Old English -lēas (devoid of, free from). In this word, it functions as a suffix forming adjectives meaning "without."