IPA: /əˈsɜːrtɪdli/
KK: /əˈsɜːrtɪdli/
In a way that expresses a strong belief or claim, often without proof.
She assertedly claimed that she was the best candidate for the job.
Assertedly → It is formed from "assert" (from Latin "assertus", meaning to affirm or declare) and "-ly" (a suffix used to form adverbs). The word "assertedly" means in a manner that affirms or declares something.
Think of someone affirming or declaring something strongly — that's what 'assertedly' means, as it describes the manner of asserting.