unforeseenact

noun
UK /ˌʌnfɔːˈsiːn ækt/
US /ˌʌnfɔːrˈsiːn ækt/

Something you do that nobody expected to happen.

The sudden unforeseenact of kindness made everyone smile.


OTHER MEANINGS

2. An action that happens without any warning or planning.

The unforeseenact of the storm caught the sailors off guard.

3. A deed that no one could have predicted beforehand.

Her unforeseenact of generosity shocked the whole town.

4. A sudden step taken by someone that surprises everyone around.

The teacher's unforeseenact of canceling the test delighted the class.