/prɪˈzuːməbli/
pre·sum·ably AW
BrE /prɪˈzjuːməbli/
NAmE /prɪˈzuːməbli/
used to say that you think that sth is probably true
Presumably this is where the accident happened.
You’ll be taking the car, presumably?
I couldn’t concentrate, presumably because I was so tired.