senseless

无谓的、毫无意义的、无缘无故的

The city was shocked by such a senseless act of violence.

这起无谓的暴力事件让全市震惊。

不省人事的、失去意识的

He was knocked senseless by the falling branch.

他被掉下来的树枝打得不省人事。

愚蠢的、没头脑的

It would be senseless to quit before finding another job.

还没找到下一份工作就辞职是很愚蠢的。

毫无意义地、无谓地

They argued senselessly for hours without reaching any decision.

他们毫无意义地争论了好几个小时，却没有做出任何决定。