unfortunately

Happening through bad luck, or because of some unfortunate event.

He unfortunately placed his hand on a loose brick.

There were an unfortunately large number of misprints.

Used (as a parenthetical word, often a sentence adverb) to express disappointment, compassion, sorrow, regret, or grief.

The houses which burned down could have been saved. Unfortunately, the fire truck had broken down on the way.

Unfortunately, the uproar awoke Mr. Jones, who sprang out of bed, making sure that there was a fox in the yard.