| Rating | Solver | Clue |
|---|---|---|
| CONTINUING | Relentless | |
| UNREMITTING | Relentless | |
| UNSTOPPABLE | Relentless | |
| PERSISTENT | Relentless | |
| REMORSELESS | Relentless | |
| STERNER | More relentless, making gangster nervous | |
| INEXPIABLE | Incapable of being mollified or appeased; relentless; implacable. | |
| RIGOR | Stiffness of opinion or temper; rugged sternness; hardness; relentless severity; hard-heartedness; cruelty. | |
| MEPHISTOPHELIAN | Pertaining to, or resembling, the devil Mephistopheles, "a crafty, scoffing, relentless fiend;" devilish; crafty. | |
| INEXORABLE | Not to be persuaded or moved by entreaty or prayer; firm; determined; unyielding; unchangeable; inflexible; relentless; as, an inexorable prince or tyrant; an inexorable judge. | |
| RELENTLESS | 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. | |
| RIGOROUS | ...ing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous executio... | |