/ rɪˈgretəbl; NAmE / adjective
regrettable (that ... ) that you are sorry about and wish had not happened :
It is regrettable that the police were not informed sooner.
The loss of jobs is highly regrettable.
► re·gret·tably / -əbli; NAmE / adverb :
Regrettably, crime has been increasing in this area.