1 feeling or expressing sadness or disappointment: --
a regretful sigh
I am very regretful indeed that there are people who have had to go without sufficient coal.
Regretful though the fact be, there it is.
We must all appreciate that, however regretful, lives will always be lost around our coast.
I suspect that he said "faltered" with a slightly regretful tone.
We are naturally always disappointed and regretful when our arrangements are found to be wanting, but that is where we find ourselves.
So that, although one may be regretful, one can understand why.
Nor is it altogether to be wondered at, however regretful it is.
I think that he will be a little regretful of the extraordinary dichotomy of views.