regret

sense 1: feel remorse for; feel sorry for; be contrite about
repent regret rue

sense 2: feel sad about the loss or absence of
regret

sense 3: decline formally or politely; "I regret I can't come to the party"
regret

sense 4: be sorry; "I regret to say..."
regret

sense 5: regret strongly
deplore lament bewail bemoan regret