unanticipated
🇺🇸
/ˌʌnænˈtɪsɪpeɪtɪd/
🇬🇧
/ˌʌnænˈtɪsɪpeɪtɪd/
something that wasn't expected or planned for
The unanticipated heavy rain caused a delay in the event.
突如其來的大雨水導致活動延期。