They were more regretful, disappointed, and frustrated.
Yes, a good agent knows how to coax and cajole a regretful seller.
Characteristically, he believes he willed his own recovery, about which he sometimes sounds almost regretful.
He offers a kind of regretful apology about his compulsion for privacy.
It's a movie the regretful spirit of which is somewhat at odds with its blithe manner.
But they also seem complacent about its inefficiencies rather than regretful and determined.
The king becomes regretful for his one little act of stealing.
It is regretful that cases had to be filed in both state and federal court to deter the dental board from enforcing its gag rule.
The unhappy affair has caused no end of regretful comment in theatrical circles.
Word Origin and History for regretful
1640s, "full of regret," from regret + -ful. Regretfully, properly "with regret," incorrectly used in place of regrettably "it is to be regretted that; calling for regret" since at least 1965. "A regrettable use, prob. after HOPEFULLY adv.2" [OED].