re·gret·ta·ble 
/rɪˈgrɛtəbəl/ adjective
/rɪˈgrɛtəbəl/ adjective [more regrettable; most regrettable] : causing sadness or disappointment : unfortunate
▪ His decision to quit is regrettable. ▪ It was a regrettable mistake.
▪ His decision to quit is regrettable. ▪ It was a regrettable mistake.
