unexpectedly
adverb /ˌʌnɪkˈspektɪdli/
  /ˌʌnɪkˈspektɪdli/
- in a way that surprises you because you were not expecting it
- They had arrived unexpectedly.
 - an unexpectedly large bill
 - The plane was unexpectedly delayed.
 - Not unexpectedly, most local business depends on tourism.
 - She died unexpectedly of a heart attack.