n.
悲伤, 可怜

[ noun ]
sadness associated with some wrong done or some disappointment
<noun.feeling>
he drank to drown his sorrowshe wrote a note expressing his regret
to his rue, the error cost him the game

Rueful \Rue"ful\, a.
1. Causing one to rue or lament; woeful; mournful; sorrowful.

2. Expressing sorrow. ``Rueful faces.'' --Dryden.

Two rueful figures, with long black cloaks. --Sir W.
Scott.
※ -- {Rue"ful*ly}, adv. -- {Rue"ful*ness}, n.