unforeseenly

not-comparable

In a manner that was not foreseen; unexpectedly.

Japanese Meaning

予期せぬ形で / 思いがけず / 不意に

The trip changed unforeseenly when a storm closed the bridge, forcing us to take a longer route.

嵐で橋が通行止めになり、私たちは長い迂回路を取らざるを得なかったため、その旅行は予期せずに変更されました。

Sense（1）

In a manner that was not foreseen; unexpectedly.