IPA: /əˈsjuːməbl/
KK: /əˈsjuːməbl/
Relating to something that can be accepted as true or taken for granted without proof.
It is assumable that the meeting will start on time, given the schedule.
Assumable is formed from "assumere" (meaning to take up or adopt) and the suffix "-able" (meaning capable of). The word describes something that is capable of being taken up or adopted.
Think of 'taking up' ('assumere') something that is 'capable of' being accepted or adopted.