To feel sorry about (a thing that has or has not happened), afterthink: to wish that a thing had not happened, that something else had happened instead.

Emotional pain on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing. / (obsolete) Dislike; aversion.

simple past tense and past participle of regret

Full of feelings of regret, indulging in regrets. / Sorrowful about what has been lost or done.

plural of regret

Third-person singular simple present indicative form of regret

Archaic form of regretting.

present participle of regret

The act by which something is regretted.

Alternative spelling of regrettable