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extraneous, impertinent, immaterial, orthogonal | not pertinent to the matter under consideration | |
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pert, impertinent, saucy, irreverent | characterized by a lightly pert and exuberant quality | |
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smart, impudent, fresh, impertinent, overbold, saucy, sassy, wise, brazen-faced, bold | improperly forward or bold |