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"unfortunately" is also used as a crossword clue. If that's what you saw, the answer is often regrettably (11 letters).
Definitions
By bad luck or in a regrettable way.
Word origin
From unfortunate + -ly or un- + fortunately.
Used in a sentence
“He unfortunately placed his hand on a loose brick.”
“There were an unfortunately large number of misprints.”
“The houses which burned down could have been saved. Unfortunately, the fire truck had broken down on the way.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“By bad luck”13 letters
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