unexpectedly
1. [ adverb ] in a way that was not expected
Synonyms: out_of_the_blue
Examples:

"her brother showed up at the wedding out of the blue"

Related terms: unexpected unexpected
2. [ adverb ] without advance planning
Synonyms: accidentally circumstantially by_chance
Examples:

"they met accidentally"

Related terms: intentionally unexpected accidental unexpected accidental
Similar spelling:   unexpected
  unexpectedness
  unexpended
  unexploited
  unexpurgated
  unexplored
  unexploded
  unexpired
  unexpressed
  unexplained
  unexpendable