a. | 1. | Unmoved by appeals for sympathy or forgiveness; insensible to the distresses of others; destitute of tenderness; unrelenting; unyielding; unpitying; |
Adj. | 1. | relentless - 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" |
2. | relentless - never-ceasing; "the relentless beat of the drums" Synonyms: persistent, unrelenting |