regrettable

Từ điển Oxford Advanced Learner 8th

re·gret·table [regrettable regrettably] BrE [rɪˈɡretəbl] NAmE [rɪˈɡretəbl] adjective ~ (that…)
(formal)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.
•a regrettable incident
Derived Word: ↑regrettably

Example Bank:
•It is highly regrettable that the delegate cannot be here in person.
•a deeply regrettable incident
•It is regrettable that the police were not informed sooner.
•This is a most regrettable incident. Steps will be taken to ensure it cannot happen again.