authoritatively
au-thor-i-ta-tive-ly
adverb
In a manner demonstrating expertise, command, or rightful power.
"She spoke authoritatively on the subject."
Thesaurus
Synonyms: magisterially
au-thor-i-ta-tive-ly
In a manner demonstrating expertise, command, or rightful power.
"She spoke authoritatively on the subject."
Synonyms: magisterially