IPA: //ʌnˈsɜːrprɪzaɪŋli//
KK: /ʌnˈsɜrprɪzɪŋli/
In a way that is expected or not surprising.
Unsurprisingly, the team won the match after their strong performance throughout the season.
Unsurprisingly → It is formed from "un-" (meaning not) and "surprising" (from the verb "surprise", which comes from Old French *surprendre*, meaning to take over or seize). The word means not causing surprise or expected.
Think of 'not' ('un-') causing 'surprise' — that's why unsurprisingly means something that is expected and does not cause surprise.