My husband is irrationally jealous over my past loves.

我丈夫对我从前的几次恋爱毫无道理地妒忌。

《柯林斯英汉双解大词典》

Is he irrationally, overemotional, and reactive?

他缺乏理性，情感过剩，反应强烈？

youdao

But they know investors are acting irrationally.

不过，这些投行也知道，投资者正失去理性。

youdao

Lenders and investors follow each other and from time to time act irrationally as a herd.

CNN: ASIANOW - TIME Asia

" Later he adds, cautiously: "There's no reason to expect the FDA to act irrationally.

FORBES: Magazine Article

They argued Sir Christopher had acted "irrationally" but three High Court judges upheld his decision.

BBC: Azelle Rodney lawyers 'can see' police surveillance film