[n] sadness associated with some wrong done or some disappointment; "he drank to drown his sorrows"; "he wrote a note expressing his regret"
[v] regret strongly
[v] be sorry; "I regret to say..."
[v] decline formally or politely; "I regret I can't come to the party"
[v] feel remorse for; feel sorry for; be contrite about
[v] feel sad about the loss or absence of