| Clue | Length | Answer |
|---|---|---|
| unplumbed | 6 letters | untold |
| unplumbed | 6 letters | virgin |
| unplumbed | 6 letters | sealed |
| unplumbed | 7 letters | unknown |
| unplumbed | 7 letters | strange |
| unplumbed | 8 letters | puzzling |
| unplumbed | 8 letters | termless |
| unplumbed | 9 letters | unbounded |
| unplumbed | 9 letters | untouched |
| unplumbed | 9 letters | unexposed |
| unplumbed | 9 letters | universal |
| unplumbed | 9 letters | uncharted |
| unplumbed | 9 letters | unlimited |
| unplumbed | 9 letters | unbeknown |
| unplumbed | 10 letters | unfamiliar |
| unplumbed | 10 letters | unexplored |
| unplumbed | 10 letters | unnumbered |
| unplumbed | 10 letters | unrevealed |
| unplumbed | 10 letters | unknowable |
| unplumbed | 10 letters | unmeasured |
| unplumbed | 10 letters | unfathomed |
| unplumbed | 10 letters | unheard-of |
| unplumbed | 11 letters | undisclosed |
| unplumbed | 11 letters | unperceived |
| unplumbed | 11 letters | unsuspected |
| unplumbed | 11 letters | unexplained |
| unplumbed | 12 letters | unclassified |
| unplumbed | 12 letters | unidentified |
| unplumbed | 12 letters | undiscovered |
| unplumbed | 12 letters | unfathomable |
| unplumbed | 14 letters | undiscoverable |
| unplumbed | 15 letters | uncircumscribed |
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