Excessive pride or self-importance; acting as if you're better than everyone else and don't need to listen to anyone.
From Latin 'arrogantia' (from arrogare meaning 'to claim for oneself'), entering English through Old French. It originally described the act of claiming more than one's due, then evolved to mean excessive self-regard.
The Latin root literally means 'to claim for yourself more than you deserve'—arrogant people are basically trying to claim extra importance points they didn't earn, which is why arrogance makes people so annoying.
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