| Rating | Solver | Clue |
|---|---|---|
| SUSTAINED | Unrelenting | |
| PERSISTENT | Unrelenting | |
| ADAMANT | Unrelenting | |
| INSISTENT | Unrelenting | |
| BOMBARDMENT | Unrelenting mortar fire | |
| IRON | Inflexible; unrelenting; as, an iron will. | |
| STURDY | Foolishly obstinate or resolute; stubborn; unrelenting; unfeeling; stern. | |
| STONY | Inflexible; cruel; unrelenting; pitiless; obdurate; perverse; cold; morally hard; appearing as if petrified; as, a stony heart; a stony gaze. | |
| 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. | |
| STERN | ... manner, or aspect; hard; severe; rigid; rigorous; austere; fixed; unchanging; unrelenting; hence, serious; resolute; harsh; as, a sternresolv... | |