regrettable
re|gret|table /rɪgr'etəbəl/
[ADJ]
You describe something as regrettable when you think that it is bad and that it should not happen or have happened. (FORMAL)
...an investigation into what the army described as a regrettable incident...
= unfortunate
● regrettably [ADV] ADV with cl, ADV adj
Regrettably we could find no sign of the man and the search was terminated...
= unfortunately
[ADJ]
You describe something as regrettable when you think that it is bad and that it should not happen or have happened. (FORMAL)
...an investigation into what the army described as a regrettable incident...
= unfortunate
● regrettably [ADV] ADV with cl, ADV adj
Regrettably we could find no sign of the man and the search was terminated...
= unfortunately