Sentence examples for difficultness from inspiring English sources

The word 'difficultness' is not commonly used in written English and is considered non-standard.
Instead, the correct form would be 'difficulty'. However, in some cases, 'difficultness' can be used in informal or creative writing to add emphasis to the degree of difficulty. Example: I can't believe the difficultness of this crossword puzzle. I have been stuck on the last clue for hours!.