Merriam-Webster Online Dictionary
regret (verb)transitive verb
1.
a) to mourn the loss or death of
b) to miss very much
2.
intransitive verb
to be very sorry for - regrets his mistakes to experience regret
1.
sorrow aroused by circumstances beyond one's control or power to repair
2.
a) an expression of distressing emotion (as sorrow)
b) a note politely declining an invitation sorrow
Merriam-Webster Online Thesaurus
regret (noun)a feeling of responsibility for wrongdoing
SYNONIMS:
contriteness, contrition, penitence, regret, remorse, remorsefulness, repentance, rue, self-reproach, shameRELATED WORDS:
compunction, misgiving, prick, qualm, scruple; blame, culpability, fault; liability, rap, responsibility; chagrin, embarrassment; anguish, distress, grief, ruth, sadness, sorrow; bloodguilt, bloodguiltiness; apology, excuses, hand-wringing, mea culpato feel sorry or dissatisfied about
SYNONIMS:
bemoan, deplore, lament, repent, rueRELATED WORDS:
ache (for), bewail, grieve (for), mourn, sorrow (for)NEAR ANTONYMS:
delight (in), enjoy, relish, revel (in), savor ( savour)