Unrelentless vs. Relentless

Unrelentlessadjective

Without respite or let up; unrelenting; relentless.

Relentlessadjective

Unrelenting or unyielding in severity

Unrelentlessadjective

relentless.

Relentlessadjective

Unremitting, steady and persistent

Relentlessadjective

Unmoved by appeals for sympathy or forgiveness; insensible to the distresses of others; destitute of tenderness; unrelenting; unyielding; unpitying; as, a prey to relentless despotism.

‘For this the avenging power employs his darts, . . .Thus will persist, relentless in his ire.’;

Relentlessadjective

not to be placated or appeased or moved by entreaty;

‘grim determination’; ‘grim necessity’; ‘Russia's final hour, it seemed, approached with inexorable certainty’; ‘relentless persecution’; ‘the stern demands of parenthood’;

Relentlessadjective

never-ceasing;

‘the relentless beat of the drums’;