regrettably

/rɪˈɡrɛtəbli/
adverb
  1. In a way that causes or shows regret; unfortunately.
    • Regrettably, the concert was canceled due to bad weather.
    • She regrettably missed the chance to say goodbye to her friend.
    • The report was regrettably incomplete and had to be revised.
Antonyms
What does "regrettably" mean? | whatsthatwordmean | whatsthatwordmean