IPA: /ˈærəɡəntli/
KK: /ˈærəɡəntli/
In a way that shows too much pride in oneself and a lack of respect for others.
He spoke arrogantly, believing he was better than everyone else.
Arrogantly → It is formed from "arrogant" (from Latin "arrogans", meaning claiming for oneself) and the suffix "-ly" (meaning in a manner of). The word "arrogantly" describes behaving in a manner that claims superiority or self-importance.
Think of someone who behaves in a way that shows they are claiming superiority — that's what it means to act arrogantly.