IPA: /əˈʃʊrɪdli/
KK: /əˈʃʊrɪdli/
In a way that shows certainty or confidence; without any doubt.
She assuredly completed the project on time, impressing everyone with her dedication.
Assuredly → It is formed from "assured" (from Old French *asseurer*, meaning to make certain) and the suffix "-ly" (meaning in a manner of). The word "assuredly" means in a manner that is certain or guaranteed.
Think of being 'certain' ('assured') and the '-ly' indicating how something is done. So, assuredly means doing something in a certain way.