Wiktionary
unregretful
a. Not regretful. Having no regrets.
WordNet
unregretful
adj. feeling no regret; "was completely unregretful about what had happened" [syn: unregretting] [ant: regretful]
Usage examples of "unregretful".
Culloden and bade a not unregretful farewell to Bothwell Gardens, her brother had been in Rome two months.