Insolence

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late Middle English (also in the sense ‘extravagant, going beyond acceptable limits’): from Latin insolent- ‘immoderate, unaccustomed, arrogant’, from in- ‘not’ + solent- ‘being accustomed’ (from the verb solere ).

wiktionary

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From Middle French insolence, from Latin īnsolentia

etymonline

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insolence (n.)

late 14c., from Latin insolentia "unusualness, strangeness; excess, immoderation; haughtiness, arrogance," from insolentem "unusual; arrogant" (see insolent).