不得体

Your levity is unseemly at this time.

在这种场合,你的轻率举动是不体的。

His tactless words had incurred his father’s deep displeasure.

他不体的话语使他父亲感到十分不快。

I was surprised by the impropriety of his remarks.

他的话不体,我听了很诧异。

She bridled at the indelicate suggestion.

她对不体的暗示发怒了。