unexpectedly
US /ˌʌn.ɪkˈspek.tɪd.li/
UK /ˌʌn.ɪkˈspek.tɪd.li/

副詞
1.
予期せず, 思いがけず
in a way that was not expected or foreseen
例:
•
The rain started unexpectedly, catching everyone by surprise.
雨が予期せず降り始め、皆を驚かせた。
•
He unexpectedly resigned from his position.
彼は予期せず職を辞任した。
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