impertinent

Concise Oxford English Dictionary © 2008 Oxford University Press:
impertinent/ɪmˈpɜːtɪnənt/

▶adjective

• 1 not showing proper respect.

• 2 formal not pertinent.

– derivatives
impertinence noun,
impertinently adverb.

– origin ME: from OFr., or from late L. impertinent- ‘not having reference to’, from L. in- ‘not’ + pertinere ‘pertain’.