a.
- 不切題的,不中肯的[(+to)]

His
impertinent remarks wasted valuable time.
他那些不著邊際的話浪費了寶貴的時間。
- 不恰當的;不合理的

impertinent curiosity
過分的好奇心
- 傲慢的;不禮貌的;莽撞的

It was
impertinent of him to behave like that.
他那種舉止很不禮貌。
衍生
ad.
impertinently
n.
impertinence; impertinency
辨析
adj.
- not showing proper respect.
- formal not pertinent.
Derivative
- impertinence n.
- impertinently adv.
Etymology
ME: from OFr., or from late L. impertinent- ‘not having reference to’, from L. in- ‘not’ + pertinere ‘pertain’.