unforeseen

1. ADJ If something that has happened was unforeseen, it was not expected to happen or known about beforehand. 未預見的

Radiation may damage cells in a way that was previously unforeseen. 輻射也許會以以前未預見的方式損壞細胞。

Unfortunately, due to unforeseen circumstances, this year's show has been cancelled. 遺憾的是，由於意外情況，今年的縯出已被取消了。