Was completely unregretful about what had happened.    From Wordnet, Princeton University. 

She was doubting now whether there had been any moral issue involved in her way of life — to walk unworried and unregretful along the gayest of all possible lanes and to keep her pride by being always herself and doing what it seemed beautiful that she should do.    From Wordnik.com.  [The Beautiful and Damned] Reference

There was no possibility of Justine transferring herself and her belongings from the southern to the northern hemisphere as quickly as Dane had; by the time she worked out the season at the Culloden and bade a not unregretful farewell to Bothwell Gardens, her brother had been in Rome two months.    From Wordnik.com.  [The Thorn Birds]

The moment you think of voting Labour, up pops the unregretful Blair.    From Wordnik.com.  [The Independent - Frontpage RSS Feed] Reference

• Mark Steel: The moment you think of voting Labour, up pops the unregretful Tony.    From Wordnik.com.  [Belfasttelegraph.co.uk - Frontpage RSS Feed] Reference

• Mark Steel: The moment you think of voting Labour, up pops the unregretful Tony Blair.    From Wordnik.com.  [Belfasttelegraph.co.uk - Frontpage RSS Feed] Reference

He smiles an unregretful smile, and says, "It's been my good fortune to go fishing at crucial times in my career.".    From Wordnik.com.  [Wheat & Weeds] Reference

And when the bust-up came Tucker sang it, not with tears, but as "a blast of unregretful assertion of independence.".    From Wordnik.com. Reference

The secret of her birth, whatever it was, never came to light but, she took kindly, as Madam Delia had predicted, to "living genteel," and grew up into a well-behaved mediocrity, unregretful of the show-tent.    From Wordnik.com.  [Oldport Days] Reference

The secret of her birth, whatever it was, never came to light, but she took kindly, as Madam Delia had predicted, to "living genteel," and grew up into a well-behaved mediocrity, unregretful of the show-tent.    From Wordnik.com.  [Oldport Days] Reference

On Allison's earthy revisit of Let It Come Down, a lightly rumbling beat-jazz rumination on judgment days, the white-bearded baritone is unafraid and unregretful - "If there's gonna be rain tonight, let it come down.".    From Wordnik.com.  [The Globe and Mail - Home RSS feed] Reference

They drove to the station, he was installed in a seat with a rug over his knees and a cushion at his back, and she hung out of the window waving unregretful farewells to the acquaintances she had really never liked till then.    From Wordnik.com.  [The Greater Inclination] Reference

She was doubting now whether there had been any moral issue involved in her way of life -- to walk unworried and unregretful along the gayest of all possible lanes and to keep her pride by being always herself and doing what it seemed beautiful that she should do.    From Wordnik.com.  [The Beautiful and Damned] Reference

He smiles an unregretful smile and says, “It’s been my good fortune to go fishing at crucial times in my career.”.    From Wordnik.com.  [FLY FISHING WITH DARTH VADER] Reference

Fades from our unregretful eyes.    From Wordnik.com.  [The Rhodesian] Reference

He feigned an unregretful surprise.    From Wordnik.com.  [The Reef] Reference

An 'unregretful throwed us all away.    From Wordnik.com.  [The Atlantic Monthly, Volume 17, No. 103, May, 1866] Reference

Can she look forth with unregretful eyes.    From Wordnik.com.  [In Flanders Fields and Other Poems] Reference

Fades from our unregretful eyes.    From Wordnik.com. Reference

“It’s crazy,” said an unregretful Hodges.    From Wordnik.com.  [The Volokh Conspiracy » Someone’s Been Watching Too Many Old Sitcoms:] Reference