IPA: /əˌθɔːrɪˈteɪtɪvli/
KK: /əˈθɔrɪtətɪvli/
In a way that shows confidence and authority, making others believe what is said or done is correct or important.
The teacher spoke authoritatively, ensuring that all the students understood the rules clearly.
Authoritatively → It is formed from "authoritative" (from Latin "auctoritas", meaning authority or influence) and the suffix "-ly" (meaning in a manner of). The word "authoritatively" means in a manner that conveys authority or influence.
Think of someone speaking with 'authority' — that's what 'authoritatively' means, doing so in a way that shows confidence and influence.