Definition of arrogatingly in US English:

arrogatingly

adverb

rare
  • In an arrogating manner; presumptuously, arrogantly.

Origin

Mid 17th century; earliest use found in John Gaule (1603/4–1687), Church of England clergyman and author. From arrogating + -ly.

Pronunciation

arrogatingly

/ˈarəɡeɪtɪŋli/