Most common
Definitions
- adj. 1
That cannot be ascertained; uncertain, unable to be determined or discovered.
Popularity over time
| Word | 1850 → 2019 | Trend |
|---|---|---|
| unascertainable | falling | |
| undiscoverable | steady |
Use in printed books, per decade from 1850 to 2019.
By length
- 14 letters
- undiscoverable