unforeseen

1. ADJ If something that has happened was unforeseen, it was not expected to happen or known about beforehand. 未预见的

Radiation may damage cells in a way that was previously unforeseen. 辐射也许会以以前未预见的方式损坏细胞。

Unfortunately, due to unforeseen circumstances, this year's show has been cancelled. 遗憾的是，由于意外情况，今年的演出已被取消了。