mischievousness
noun/ˈmɪst͡ʃɪvəsnəs/
Etymology From mischievous + -ness.
1
The characteristic of being mischievous; the tendency to make mischief.
- Up to the recent accident, which is attributed to the mischievousness of someone in releasing safety devices on the wagon, the railway has enjoyed an accident-free record.1946 November and December, “Notes and News: An American Mountain Railway”, in Railway Magazine, page 382: