uncrossableness means the quality of being uncrossable. Lexicurio rates it Sui generis — a strength score of 95 out of 100.
noun
- The quality of being uncrossable.“To think that the main northern road should be blocked to vehicular traffic by the uncrossableness of the Hunter for six months is simply scandalous, and doesn’t redound much to the credit of the vaunted energy of the Roads and Bridges Department.”