unanticipated
🇺🇸
/ˌʌnænˈtɪsɪpeɪtɪd/
🇬🇧
/ˌʌnænˈtɪsɪpeɪtɪd/
something that wasn't expected or planned for
The unanticipated heavy rain caused a delay in the event.
予期しない激しい雨がイベントの遅延を招いた。