| Solution | Length | |
|---|---|---|
| 4 letters | ||
| cold | 4 | |
| 5 letters | ||
| aloof | 5 | |
| tough | 5 | |
| stony | 5 | |
| rocky | 5 | |
| stern | 5 | |
| 6 letters | ||
| unkind | 6 | |
| strict | 6 | |
| severe | 6 | |
| 7 letters | ||
| callous | 7 | |
| unmoved | 7 | |
| 8 letters | ||
| ruthless | 8 | |
| UNLOVING | 8 | |
| SOULLESS | 8 | |
| 9 letters | ||
| repugnant | 9 | |
| uncordial | 9 | |
| unfeeling | 9 | |
| unamiable | 9 | |
| repellent | 9 | |
| 10 letters | ||
| UNYIELDING | 10 | |
| unmerciful | 10 | |
| UNGRACIOUS | 10 | |
| spiritless | 10 | |
| relentless | 10 | |
| 11 letters | ||
| illdisposed | 11 | |
| hardhearted | 11 | |
| UNFORGIVING | 11 | |
| unemotional | 11 | |
| UNTOUCHABLE | 11 | |
| remorseless | 11 | |
| 12 letters | ||
| UNFLATTERING | 12 | |
| UNREMORSEFUL | 12 | |
| unresponsive | 12 | |
| ill-disposed | 12 | |
| 13 letters | ||
| unimpassioned | 13 | |
| unsusceptible | 13 | |
| 14 letters | ||
| unaffectionate | 14 | |
| 15 letters | ||
| uncompassionate | 15 | |