IPA: /əˈsuːmɪdli/
KK: /əˈsumədli/
In a way that is based on what is generally accepted or believed, but not proven.
Assumedly, the meeting will start at 10 AM, as usual.
Assumedly → It is formed from "assume" (from Latin "assumere", meaning to take up or receive) and "-ly" (a suffix used to form adverbs). The word "assumedly" means in a manner that is taken for granted or accepted without proof.
Think of 'taking up' ('assumere') something as a given — that's why 'assumedly' means something is accepted without needing proof.