imperiously

This adverb describes a manner of speaking or behaving that is arrogant and overbearing, characterized by an assumption of power and a demand for immediate obedience. It carries a strong negative connotation of entitlement and a lack of regard for others' feelings or status.

In social contexts, it is used to describe people who act like superiors regardless of their actual rank. While "authoritatively" suggests a legitimate right to lead or a level of expertise, "imperiously" implies an oppressive or haughty exercise of power that is often perceived as offensive or unjustified.