| unregretful | (adj) feeling no regret, Syn. unregretting, Ant. regretful, Example: was completely unregretful about what had happened |
| regretful | (adj) feeling or expressing regret or sorrow or a sense of loss over something done or undone, Syn. bad, sorry, Ant. unregretful, Example: felt regretful over his vanished youth; regretful over mistakes she had made; he felt bad about breaking the vase |
| regretfully | (adv) with regret (used in polite formulas), Example: I must regretfully decline your kind invitation |