不得体

I was surprised by the impropriety of his remarks.

他话不得体,我听了很诧异。

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

他不得体话语使他父十分不快。

Your levity is unseemly at this time.

在这种场合,你轻举动是不得体。

She bridled at the indelicate suggestion.

她对不得体发怒了。