Thee interrogative asks a question.

疑问句就是提出问题的句式。

youdao

He made a further interrogative noise.

他发出了进一步疑问的声音。

《柯林斯英汉双解大词典》

The ovale of her face, her youth, the delicacy of her skin and interrogative eyes convey a purity and an innocence that make her a representation of a timeless beauty.

她那椭圆形的脸庞，她的青春活力，她细腻的皮肤和欲言又止的眼神透露出的纯洁和天真，让她具有了超越时空的美丽。

youdao

Had she ever seen this man as a younger self, been taken in by those strikingly interrogative eyes, received?

NEWYORKER: A Beneficiary

There is, too, a troubling knowingness, an uneasiness about how seriously the novel should press down on its seriously interrogative title.

NEWYORKER: True Lives