| Solution | Length | |
|---|---|---|
| 4 letters | ||
| dull | 4 | |
| drab | 4 | |
| tame | 4 | |
| slow | 4 | |
| 5 letters | ||
| jaded | 5 | |
| slack | 5 | |
| amort | 5 | |
| vapid | 5 | |
| stoic | 5 | |
| tepid | 5 | |
| stiff | 5 | |
| 6 letters | ||
| solemn | 6 | |
| common | 6 | |
| wooden | 6 | |
| torpid | 6 | |
| stuffy | 6 | |
| supine | 6 | |
| leaden | 6 | |
| stodgy | 6 | |
| 7 letters | ||
| subdued | 7 | |
| defunct | 7 | |
| tedious | 7 | |
| sterile | 7 | |
| languid | 7 | |
| 8 letters | ||
| sluggish | 8 | |
| UNLOVING | 8 | |
| resigned | 8 | |
| suicidal | 8 | |
| SOULLESS | 8 | |
| 9 letters | ||
| spineless | 9 | |
| withdrawn | 9 | |
| apathetic | 9 | |
| unfeeling | 9 | |
| tasteless | 9 | |
| woebegone | 9 | |
| cheerless | 9 | |
| ungallant | 9 | |
| inanimate | 9 | |
| stupefied | 9 | |
| soporific | 9 | |
| spunkless | 9 | |
| 11 letters | ||
| world-weary | 11 | |
| superficial | 11 | |
| UNCONCERNED | 11 | |
| wishy-washy | 11 | |
| unemotional | 11 | |
| UNTOUCHABLE | 11 | |
| 12 letters | ||
| uninterested | 12 | |
| unresponsive | 12 | |
| 13 letters | ||
| unsympathetic | 13 | |
| unsusceptible | 13 | |
| unimpassioned | 13 | |
| 14 letters | ||
| unaffectionate | 14 | |