transitive verb regretted -·gret′·ted, regretting -·gret′·ting

1. to feel sorry about or mourn for (a person or thing gone, lost, etc.)
2. to feel troubled or remorseful over (something that has happened, one's own acts, etc.)

Etymology: ME regretten < OFr regreter, to bewail the dead < re- + Gmc base as in OE gretan, ON grata, Goth gretan, to weep

noun

1. a troubled feeling or remorse over something that has happened, esp. over something that one has done or left undone
2. sorrow over a person or thing gone, lost, etc.