adj. 25B6; adjective
she asked a lot of impertinent questions : RUDE, insolent, impolite, ill-mannered, bad-mannered, uncivil, discourteous, disrespectful; impudent, cheeky, audacious, bold, brazen, brash, presumptuous, forward; tactless, undiplomatic; informal brass-necked, saucy; N. Amer. informal sassy; archaic contumelious.
(formal) talk of rhetoric is impertinent to this process : IRRELEVANT, inapplicable, inapposite, inappropriate, immaterial, unrelated, unconnected, not germane; beside the point, out of place.
polite, relevant.