| Answer | Crossword Clue |
|---|---|
| unknowableness | UNKNOWABLE, that cannot be known |
| unknowably | UNKNOWABLE, that cannot be known |
| unknowables | UNKNOWABLE, something that cannot be known |
| incognisable | that cannot be known or distinguished also INCOGNIZABLE |
| incognizable | that cannot be known or distinguished also INCOGNISABLE |
| unknowable | that cannot be known / something that cannot be known |
