Unexpectedly

[Jason Yan]

In a way that was not expected or regarded as likely.

[Lanell]

It’s an adverb and it means in a way that was not expected, anticipated or foreseen. So if something happens totally [out of the blue], then [it happens] [unexpectedly].

[Cami]

The favorite adverb of major news organizations when describing dreary economic news since 2009. It is believed to have originated around [May 19], 2009, when Reuters reported new U.S. housing starts and permits unexpectedly fell to record lows in April . . . [denting] hopes that stability in the housing market was imminent. Has since been incorporated into the style book of the [Associated Press], as well as other journalistic entities.
Anticipated to remain in the forefront of economic reporting until the end of 2016, when it will unexpectedly disappear from the landscape.