/ɪmˈpɜːtɪnənt/ adj.1.(impudent)无礼的;粗鲁的;傲慢的;放肆的
Would it be impertinent to ask where exactly you were?能不能冒昧问一下你当时到底在哪里?
I don't like strangers who ask impertinent questions.我不喜欢提出不礼貌问题的陌生人。
2.(irrelevant)不切题的;不相关的;不恰当的
This is impertinent to our purpose.这与我们的目的无关。