1. 不合时宜的;不合适的
If you describe something as inopportune or if you say that it happens at an inopportune time, you mean that it happens at an unfortunate or unsuitable time, and causes trouble or embarrassment because of this.

e.g. The dismissals came at an inopportune time.
解雇通知来得不合时宜。

adj

1. not opportune

e.g. arrived at a most inopportune hour
an inopportune visit