1. in a way that causes regret or disappointment; unfortunately
Usage: used to express that something is unfortunate or disappointing

Examples

• Regrettably, we cannot offer you the position at this time.
• The concert was regrettably canceled due to bad weather.
• Regrettably, many students failed to submit their assignments on time.
• The restaurant’s service was regrettably slow during our visit.
• Regrettably, the museum will be closed for renovations next month.
• The team’s performance was regrettably poor in the championship game.