unexpectedness; element of surprise
Refers to the quality of being surprising or unpredictable. Often used when discussing stories, events, or people's actions.
この映画の魅力は意外性にある。
The appeal of this movie lies in its unexpectedness.
There is an element of surprise in his actions.
Compound of 意外 (unexpected) and the suffix 性 (-ness, -ity), forming an abstract noun meaning 'unexpectedness'.