Adjective
Full of regret; indulging in regrets; repining.
Source: Webster's dictionaryThe most regretful people on earth are those who felt the call to creative work, who felt their own creative power restive and uprising, and gave to it neither power nor time. Mary Oliver
A good world needs knowledge, kindliness, and courage; it does not need a regretful hankering after the past or a fettering of the free intelligence by the words uttered long ago by ignorant men. Bertrand Russell
I'm not regretful about dropping acid, but I could have stopped it a little sooner. David Carradine
How great the grandfathers are, but how regretful what they left behind. Arabic Proverb
felt regretful over his vanished youth Source: Internet
regretful over mistakes she had made Source: Internet